521072244 has 96 divisors (see below), whose sum is σ = 1684300800. Its totient is φ = 135341280.

The previous prime is 521072243. The next prime is 521072297. The reversal of 521072244 is 442270125.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521072243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23014 + ... + 39645.

It is an arithmetic number, because the mean of its divisors is an integer number (17544800).

Almost surely, 2^521072244 is an apocalyptic number.

521072244 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

521072244 is an abundant number, since it is smaller than the sum of its proper divisors (1163228556).

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

521072244 is a wasteful number, since it uses less digits than its factorization.

521072244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62690 (or 62682 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 521072244 is about 22827.0068997230. The cubic root of 521072244 is about 804.6974900791.

The spelling of 521072244 in words is "five hundred twenty-one million, seventy-two thousand, two hundred forty-four".