52155521 has 8 divisors (see below), whose sum is σ = 57227904. Its totient is φ = 47138320.

The previous prime is 52155511. The next prime is 52155527. The reversal of 52155521 is 12555125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52155521 - 2¹⁸ = 51893377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52155527) 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, 11801 + ... + 15606.

It is an arithmetic number, because the mean of its divisors is an integer number (7153488).

Almost surely, 2^52155521 is an apocalyptic number.

It is an amenable number.

52155521 is a deficient number, since it is larger than the sum of its proper divisors (5072383).

52155521 is a wasteful number, since it uses less digits than its factorization.

52155521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27591.

The product of its digits is 2500, while the sum is 26.

The square root of 52155521 is about 7221.8779413668. The cubic root of 52155521 is about 373.6228503777.

The spelling of 52155521 in words is "fifty-two million, one hundred fifty-five thousand, five hundred twenty-one".