52157481 has 8 divisors (see below), whose sum is σ = 70181760. Its totient is φ = 34452432.

The previous prime is 52157467. The next prime is 52157507. The reversal of 52157481 is 18475125.

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

It is not a de Polignac number, because 52157481 - 2¹³ = 52149289 is a prime.

It is a super-2 number, since 2×52157481² = 5440805648530722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52157401) 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, 79425 + ... + 80078.

It is an arithmetic number, because the mean of its divisors is an integer number (8772720).

Almost surely, 2^52157481 is an apocalyptic number.

It is an amenable number.

52157481 is a deficient number, since it is larger than the sum of its proper divisors (18024279).

52157481 is a wasteful number, since it uses less digits than its factorization.

52157481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159615.

The product of its digits is 11200, while the sum is 33.

The square root of 52157481 is about 7222.0136388683. The cubic root of 52157481 is about 373.6275305573.

The spelling of 52157481 in words is "fifty-two million, one hundred fifty-seven thousand, four hundred eighty-one".