51521522245201 has 4 divisors (see below), whose sum is σ = 51521583336304. Its totient is φ = 51521461154100.

The previous prime is 51521522245183. The next prime is 51521522245229. The reversal of 51521522245201 is 10254222512515.

It is a happy number.

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 51521522245201 - 2²⁵ = 51521488690769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51521522245231) 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, 29262555 + ... + 30973216.

It is an arithmetic number, because the mean of its divisors is an integer number (12880395834076).

Almost surely, 2^{51521522245201} is an apocalyptic number.

It is an amenable number.

51521522245201 is a deficient number, since it is larger than the sum of its proper divisors (61091103).

51521522245201 is an equidigital number, since it uses as much as digits as its factorization.

51521522245201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61091102.

The product of its (nonzero) digits is 80000, while the sum is 37.

Adding to 51521522245201 its reverse (10254222512515), we get a palindrome (61775744757716).

The spelling of 51521522245201 in words is "fifty-one trillion, five hundred twenty-one billion, five hundred twenty-two million, two hundred forty-five thousand, two hundred one".