52245690 has 32 divisors (see below), whose sum is σ = 143303040. Its totient is φ = 11941824.

The previous prime is 52245689. The next prime is 52245691. The reversal of 52245690 is 9654225.

It is an interprime number because it is at equal distance from previous prime (52245689) and next prime (52245691).

It is a super-2 number, since 2×52245690² = 5459224247152200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52245691) 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, 124185 + ... + 124604.

It is an arithmetic number, because the mean of its divisors is an integer number (4478220).

Almost surely, 2^52245690 is an apocalyptic number.

52245690 is an abundant number, since it is smaller than the sum of its proper divisors (91057350).

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

52245690 is a wasteful number, since it uses less digits than its factorization.

52245690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248806.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 52245690 is about 7228.1180123183. The cubic root of 52245690 is about 373.8380388644.

The spelling of 52245690 in words is "fifty-two million, two hundred forty-five thousand, six hundred ninety".