1220152554 has 48 divisors (see below), whose sum is σ = 2739391200. Its totient is φ = 392037408.

The previous prime is 1220152547. The next prime is 1220152567. The reversal of 1220152554 is 4552510221.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 384177 + ... + 387339.

It is an arithmetic number, because the mean of its divisors is an integer number (57070650).

Almost surely, 2^1220152554 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220152554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1369695600).

1220152554 is an abundant number, since it is smaller than the sum of its proper divisors (1519238646).

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

1220152554 is a wasteful number, since it uses less digits than its factorization.

1220152554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3939 (or 3936 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 1220152554 is about 34930.6821290395. The cubic root of 1220152554 is about 1068.5742661299.

Adding to 1220152554 its reverse (4552510221), we get a palindrome (5772662775).

The spelling of 1220152554 in words is "one billion, two hundred twenty million, one hundred fifty-two thousand, five hundred fifty-four".