1554221311332 has 12 divisors (see below), whose sum is σ = 3626516393136. Its totient is φ = 518073770440.

The previous prime is 1554221311277. The next prime is 1554221311387. The reversal of 1554221311332 is 2331131224551.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1554221311277) and next prime (1554221311387).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1554221311332² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1554221311293 and 1554221311302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64759221294 + ... + 64759221317.

It is an arithmetic number, because the mean of its divisors is an integer number (302209699428).

Almost surely, 2^{1554221311332} is an apocalyptic number.

1554221311332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1554221311332 is an abundant number, since it is smaller than the sum of its proper divisors (2072295081804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1554221311332 is a wasteful number, since it uses less digits than its factorization.

1554221311332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129518442618 (or 129518442616 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

Adding to 1554221311332 its reverse (2331131224551), we get a palindrome (3885352535883).

The spelling of 1554221311332 in words is "one trillion, five hundred fifty-four billion, two hundred twenty-one million, three hundred eleven thousand, three hundred thirty-two".