51631221413402 has 8 divisors (see below), whose sum is σ = 77567654013012. Its totient is φ = 25775336742400.

The previous prime is 51631221413371. The next prime is 51631221413413. The reversal of 51631221413402 is 20431412213615.

It can be written as a sum of positive squares in 2 ways, for example, as 51259571457241 + 371649956161 = 7159579^2 + 609631^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20136980549 + ... + 20136983112.

Almost surely, 2^{51631221413402} is an apocalyptic number.

51631221413402 is a deficient number, since it is larger than the sum of its proper divisors (25936432599610).

51631221413402 is a wasteful number, since it uses less digits than its factorization.

51631221413402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40273964304.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 51631221413402 in words is "fifty-one trillion, six hundred thirty-one billion, two hundred twenty-one million, four hundred thirteen thousand, four hundred two".