52561557 has 24 divisors (see below), whose sum is σ = 78189696. Its totient is φ = 34007616.

The previous prime is 52561541. The next prime is 52561573. The reversal of 52561557 is 75516525.

It is a happy number.

52561557 is a `hidden beast` number, since 52 + 56 + 1 + 557 = 666.

It is an interprime number because it is at equal distance from previous prime (52561541) and next prime (52561573).

It is not a de Polignac number, because 52561557 - 2⁴ = 52561541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52561517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57498 + ... + 58404.

It is an arithmetic number, because the mean of its divisors is an integer number (3257904).

Almost surely, 2^52561557 is an apocalyptic number.

It is an amenable number.

52561557 is a deficient number, since it is larger than the sum of its proper divisors (25628139).

52561557 is a wasteful number, since it uses less digits than its factorization.

52561557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097 (or 1094 counting only the distinct ones).

The product of its digits is 52500, while the sum is 36.

The square root of 52561557 is about 7249.9349652256. The cubic root of 52561557 is about 374.5899090312.

The spelling of 52561557 in words is "fifty-two million, five hundred sixty-one thousand, five hundred fifty-seven".