51211645125022 has 8 divisors (see below), whose sum is σ = 77181531516072. Its totient is φ = 25484467953000.

The previous prime is 51211645125013. The next prime is 51211645125031. The reversal of 51211645125022 is 22052154611215.

It is an interprime number because it is at equal distance from previous prime (51211645125013) and next prime (51211645125031).

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

It is a super-2 number, since 2×51211645125022² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

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, 60677304229 + ... + 60677305072.

It is an arithmetic number, because the mean of its divisors is an integer number (9647691439509).

Almost surely, 2^{51211645125022} is an apocalyptic number.

51211645125022 is a deficient number, since it is larger than the sum of its proper divisors (25969886391050).

51211645125022 is a wasteful number, since it uses less digits than its factorization.

51211645125022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121354609514.

The product of its (nonzero) digits is 48000, while the sum is 37.

Adding to 51211645125022 its reverse (22052154611215), we get a palindrome (73263799736237).

The spelling of 51211645125022 in words is "fifty-one trillion, two hundred eleven billion, six hundred forty-five million, one hundred twenty-five thousand, twenty-two".