12551653023231 has 32 divisors (see below), whose sum is σ = 19657343490048. Its totient is φ = 6974712108000.

The previous prime is 12551653023211. The next prime is 12551653023233. The reversal of 12551653023231 is 13232035615521.

It is not a de Polignac number, because 12551653023231 - 2⁷ = 12551653023103 is a prime.

It is a super-2 number, since 2×12551653023231² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12551653023231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12551653023233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30411645 + ... + 30821606.

It is an arithmetic number, because the mean of its divisors is an integer number (614291984064).

Almost surely, 2^{12551653023231} is an apocalyptic number.

12551653023231 is a deficient number, since it is larger than the sum of its proper divisors (7105690466817).

12551653023231 is a wasteful number, since it uses less digits than its factorization.

12551653023231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61233531.

The product of its (nonzero) digits is 162000, while the sum is 39.

Adding to 12551653023231 its reverse (13232035615521), we get a palindrome (25783688638752).

The spelling of 12551653023231 in words is "twelve trillion, five hundred fifty-one billion, six hundred fifty-three million, twenty-three thousand, two hundred thirty-one".