52790257221 has 16 divisors (see below), whose sum is σ = 75870807936. Its totient is φ = 32456563776.

The previous prime is 52790257189. The next prime is 52790257241. The reversal of 52790257221 is 12275209725.

It is not a de Polignac number, because 52790257221 - 2⁵ = 52790257189 is a prime.

It is a super-2 number, since 2×52790257221² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52790257241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 576585 + ... + 661838.

It is an arithmetic number, because the mean of its divisors is an integer number (4741925496).

Almost surely, 2^52790257221 is an apocalyptic number.

It is an amenable number.

52790257221 is a deficient number, since it is larger than the sum of its proper divisors (23080550715).

52790257221 is a wasteful number, since it uses less digits than its factorization.

52790257221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239532.

The product of its (nonzero) digits is 176400, while the sum is 42.

The spelling of 52790257221 in words is "fifty-two billion, seven hundred ninety million, two hundred fifty-seven thousand, two hundred twenty-one".