252520221004 has 24 divisors (see below), whose sum is σ = 445227089328. Its totient is φ = 125312858880.

The previous prime is 252520220951. The next prime is 252520221017. The reversal of 252520221004 is 400122025252.

It is a self number, because there is not a number n which added to its sum of digits gives 252520221004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2789152 + ... + 2878264.

It is an arithmetic number, because the mean of its divisors is an integer number (18551128722).

Almost surely, 2^252520221004 is an apocalyptic number.

It is an amenable number.

252520221004 is a deficient number, since it is larger than the sum of its proper divisors (192706868324).

252520221004 is a wasteful number, since it uses less digits than its factorization.

252520221004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94425 (or 94423 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 252520221004 its reverse (400122025252), we get a palindrome (652642246256).

The spelling of 252520221004 in words is "two hundred fifty-two billion, five hundred twenty million, two hundred twenty-one thousand, four".