51631355136031 has 4 divisors (see below), whose sum is σ = 56325114693864. Its totient is φ = 46937595578200.

The previous prime is 51631355136029. The next prime is 51631355136059. The reversal of 51631355136031 is 13063155313615.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51631355136031 - 2¹ = 51631355136029 is a prime.

It is a super-2 number, since 2×51631355136031² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51631355136001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2346879778900 + ... + 2346879778921.

It is an arithmetic number, because the mean of its divisors is an integer number (14081278673466).

Almost surely, 2^{51631355136031} is an apocalyptic number.

51631355136031 is a deficient number, since it is larger than the sum of its proper divisors (4693759557833).

51631355136031 is a wasteful number, since it uses less digits than its factorization.

51631355136031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4693759557832.

The product of its (nonzero) digits is 364500, while the sum is 43.

The spelling of 51631355136031 in words is "fifty-one trillion, six hundred thirty-one billion, three hundred fifty-five million, one hundred thirty-six thousand, thirty-one".