52555221731 has 4 divisors (see below), whose sum is σ = 52721011392. Its totient is φ = 52389432072.

The previous prime is 52555221707. The next prime is 52555221749. The reversal of 52555221731 is 13712255525.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 52555221731 - 2¹⁴ = 52555205347 is a prime.

It is a super-2 number, since 2×52555221731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52555221791) 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, 82894355 + ... + 82894988.

It is an arithmetic number, because the mean of its divisors is an integer number (13180252848).

Almost surely, 2^52555221731 is an apocalyptic number.

52555221731 is a deficient number, since it is larger than the sum of its proper divisors (165789661).

52555221731 is a wasteful number, since it uses less digits than its factorization.

52555221731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165789660.

The product of its digits is 105000, while the sum is 38.

The spelling of 52555221731 in words is "fifty-two billion, five hundred fifty-five million, two hundred twenty-one thousand, seven hundred thirty-one".