51206263644631 has 8 divisors (see below), whose sum is σ = 53433558557280. Its totient is φ = 48979046700672.

The previous prime is 51206263644623. The next prime is 51206263644671. The reversal of 51206263644631 is 13644636260215.

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

It is a cyclic number.

It is not a de Polignac number, because 51206263644631 - 2³ = 51206263644623 is a prime.

It is a super-2 number, since 2×51206263644631² (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 (51206263644671) 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, 18148126 + ... + 20779003.

It is an arithmetic number, because the mean of its divisors is an integer number (6679194819660).

Almost surely, 2^{51206263644631} is an apocalyptic number.

51206263644631 is a deficient number, since it is larger than the sum of its proper divisors (2227294912649).

51206263644631 is a wasteful number, since it uses less digits than its factorization.

51206263644631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38984345.

The product of its (nonzero) digits is 3732480, while the sum is 49.

The spelling of 51206263644631 in words is "fifty-one trillion, two hundred six billion, two hundred sixty-three million, six hundred forty-four thousand, six hundred thirty-one".