52155997 has 4 divisors (see below), whose sum is σ = 52531360. Its totient is φ = 51780636.

The previous prime is 52155967. The next prime is 52156003. The reversal of 52155997 is 79955125.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52155997 - 2¹⁵ = 52123229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52155967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187473 + ... + 187750.

It is an arithmetic number, because the mean of its divisors is an integer number (13132840).

Almost surely, 2^52155997 is an apocalyptic number.

It is an amenable number.

52155997 is a deficient number, since it is larger than the sum of its proper divisors (375363).

52155997 is a wasteful number, since it uses less digits than its factorization.

52155997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375362.

The product of its digits is 141750, while the sum is 43.

The square root of 52155997 is about 7221.9108967087. The cubic root of 52155997 is about 373.6239870035.

The spelling of 52155997 in words is "fifty-two million, one hundred fifty-five thousand, nine hundred ninety-seven".