51671453631 has 8 divisors (see below), whose sum is σ = 78737453184. Its totient is φ = 29526544920.

The previous prime is 51671453599. The next prime is 51671453653. The reversal of 51671453631 is 13635417615.

It is a happy number.

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

It is not a de Polignac number, because 51671453631 - 2⁵ = 51671453599 is a prime.

It is a super-2 number, since 2×51671453631² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51671453731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1230272685 + ... + 1230272726.

It is an arithmetic number, because the mean of its divisors is an integer number (9842181648).

Almost surely, 2^51671453631 is an apocalyptic number.

51671453631 is a deficient number, since it is larger than the sum of its proper divisors (27065999553).

51671453631 is a wasteful number, since it uses less digits than its factorization.

51671453631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2460545421.

The product of its digits is 226800, while the sum is 42.

The spelling of 51671453631 in words is "fifty-one billion, six hundred seventy-one million, four hundred fifty-three thousand, six hundred thirty-one".