51100364723021 has 4 divisors (see below), whose sum is σ = 53789857603200. Its totient is φ = 48410871842844.

The previous prime is 51100364723003. The next prime is 51100364723027. The reversal of 51100364723021 is 12032746300115.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51100364723021 - 2²² = 51100360528717 is a prime.

It is a super-2 number, since 2×51100364723021² (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 (51100364723027) 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, 1344746440061 + ... + 1344746440098.

It is an arithmetic number, because the mean of its divisors is an integer number (13447464400800).

Almost surely, 2^{51100364723021} is an apocalyptic number.

It is an amenable number.

51100364723021 is a deficient number, since it is larger than the sum of its proper divisors (2689492880179).

51100364723021 is a wasteful number, since it uses less digits than its factorization.

51100364723021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2689492880178.

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 51100364723021 in words is "fifty-one trillion, one hundred billion, three hundred sixty-four million, seven hundred twenty-three thousand, twenty-one".