1251431423253 has 12 divisors (see below), whose sum is σ = 1971952545888. Its totient is φ = 758443286760.

The previous prime is 1251431423219. The next prime is 1251431423299. The reversal of 1251431423253 is 3523241341521.

1251431423253 is a `hidden beast` number, since 1 + 2 + 5 + 14 + 314 + 2 + 325 + 3 = 666.

It is not a de Polignac number, because 1251431423253 - 2²⁸ = 1251162987797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251431423153) 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, 6320360625 + ... + 6320360822.

It is an arithmetic number, because the mean of its divisors is an integer number (164329378824).

Almost surely, 2^{1251431423253} is an apocalyptic number.

It is an amenable number.

1251431423253 is a deficient number, since it is larger than the sum of its proper divisors (720521122635).

1251431423253 is a wasteful number, since it uses less digits than its factorization.

1251431423253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12640721464 (or 12640721461 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

Adding to 1251431423253 its reverse (3523241341521), we get a palindrome (4774672764774).

The spelling of 1251431423253 in words is "one trillion, two hundred fifty-one billion, four hundred thirty-one million, four hundred twenty-three thousand, two hundred fifty-three".