521230044 has 24 divisors (see below), whose sum is σ = 1222927888. Its totient is φ = 172782720.

The previous prime is 521230019. The next prime is 521230049. The reversal of 521230044 is 440032125.

It is a self number, because there is not a number n which added to its sum of digits gives 521230044.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521230049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117817 + ... + 122160.

Almost surely, 2^521230044 is an apocalyptic number.

It is an amenable number.

521230044 is an abundant number, since it is smaller than the sum of its proper divisors (701697844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521230044 is a wasteful number, since it uses less digits than its factorization.

521230044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240165 (or 240163 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 521230044 is about 22830.4630702051. The cubic root of 521230044 is about 804.7787126283.

Adding to 521230044 its reverse (440032125), we get a palindrome (961262169).

It can be divided in two parts, 52 and 1230044, that added together give a triangular number (1230096 = T₁₅₆₈).

The spelling of 521230044 in words is "five hundred twenty-one million, two hundred thirty thousand, forty-four".