52157447 has 4 divisors (see below), whose sum is σ = 52172136. Its totient is φ = 52142760.

The previous prime is 52157429. The next prime is 52157467. The reversal of 52157447 is 74475125.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 52157447 - 2¹⁸ = 51895303 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 (52157467) 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, 1673 + ... + 10349.

It is an arithmetic number, because the mean of its divisors is an integer number (13043034).

Almost surely, 2^52157447 is an apocalyptic number.

52157447 is a deficient number, since it is larger than the sum of its proper divisors (14689).

52157447 is an equidigital number, since it uses as much as digits as its factorization.

52157447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14688.

The product of its digits is 39200, while the sum is 35.

The square root of 52157447 is about 7222.0112849538. The cubic root of 52157447 is about 373.6274493715.

The spelling of 52157447 in words is "fifty-two million, one hundred fifty-seven thousand, four hundred forty-seven".