52521810 has 32 divisors (see below), whose sum is σ = 137512512. Its totient is φ = 12732480.

The previous prime is 52521809. The next prime is 52521817. The reversal of 52521810 is 1812525.

It is a super-2 number, since 2×52521810² = 5517081051352200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (52521817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79249 + ... + 79908.

It is an arithmetic number, because the mean of its divisors is an integer number (4297266).

Almost surely, 2^52521810 is an apocalyptic number.

52521810 is an abundant number, since it is smaller than the sum of its proper divisors (84990702).

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

52521810 is a wasteful number, since it uses less digits than its factorization.

52521810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159178.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 52521810 is about 7247.1932498037. The cubic root of 52521810 is about 374.4954637083.

The spelling of 52521810 in words is "fifty-two million, five hundred twenty-one thousand, eight hundred ten".