521042252 has 6 divisors (see below), whose sum is σ = 911823948. Its totient is φ = 260521124.

The previous prime is 521042219. The next prime is 521042273. The reversal of 521042252 is 252240125.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65130278 + ... + 65130285.

It is an arithmetic number, because the mean of its divisors is an integer number (151970658).

Almost surely, 2^521042252 is an apocalyptic number.

It is an amenable number.

521042252 is a deficient number, since it is larger than the sum of its proper divisors (390781696).

521042252 is a wasteful number, since it uses less digits than its factorization.

521042252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130260567 (or 130260565 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 521042252 is about 22826.3499491268. The cubic root of 521042252 is about 804.6820507931.

Adding to 521042252 its reverse (252240125), we get a palindrome (773282377).

The spelling of 521042252 in words is "five hundred twenty-one million, forty-two thousand, two hundred fifty-two".