1551551231133 has 12 divisors (see below), whose sum is σ = 2241440443008. Its totient is φ = 1034224001160.

The previous prime is 1551551231129. The next prime is 1551551231161. The reversal of 1551551231133 is 3311321551551.

1551551231133 is a `hidden beast` number, since 1 + 5 + 5 + 1 + 5 + 512 + 3 + 1 + 133 = 666.

It is not a de Polignac number, because 1551551231133 - 2² = 1551551231129 is a prime.

It is a super-2 number, since 2×1551551231133² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551551231233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11888685 + ... + 12018482.

It is an arithmetic number, because the mean of its divisors is an integer number (186786703584).

Almost surely, 2^{1551551231133} is an apocalyptic number.

It is an amenable number.

1551551231133 is a deficient number, since it is larger than the sum of its proper divisors (689889211875).

1551551231133 is a wasteful number, since it uses less digits than its factorization.

1551551231133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23914384 (or 23914381 counting only the distinct ones).

The product of its digits is 33750, while the sum is 36.

Adding to 1551551231133 its reverse (3311321551551), we get a palindrome (4862872782684).

The spelling of 1551551231133 in words is "one trillion, five hundred fifty-one billion, five hundred fifty-one million, two hundred thirty-one thousand, one hundred thirty-three".