52257720 has 32 divisors (see below), whose sum is σ = 156773520. Its totient is φ = 13935360.

The previous prime is 52257719. The next prime is 52257721. The reversal of 52257720 is 2775225.

It is an interprime number because it is at equal distance from previous prime (52257719) and next prime (52257721).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52257721) 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, 217621 + ... + 217860.

Almost surely, 2^52257720 is an apocalyptic number.

It is an amenable number.

52257720 is an abundant number, since it is smaller than the sum of its proper divisors (104515800).

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

52257720 is a wasteful number, since it uses less digits than its factorization.

52257720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435495 (or 435491 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 52257720 is about 7228.9501312431. The cubic root of 52257720 is about 373.8667297572.

The spelling of 52257720 in words is "fifty-two million, two hundred fifty-seven thousand, seven hundred twenty".