52161639 has 8 divisors (see below), whose sum is σ = 70501872. Its totient is φ = 34297920.

The previous prime is 52161617. The next prime is 52161647. The reversal of 52161639 is 93616125.

It is a happy number.

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

It is not a de Polignac number, because 52161639 - 2¹⁷ = 52030567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52169639) 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, 118872 + ... + 119309.

It is an arithmetic number, because the mean of its divisors is an integer number (8812734).

Almost surely, 2^52161639 is an apocalyptic number.

52161639 is a deficient number, since it is larger than the sum of its proper divisors (18340233).

52161639 is a wasteful number, since it uses less digits than its factorization.

52161639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238257.

The product of its digits is 9720, while the sum is 33.

The square root of 52161639 is about 7222.3015029837. The cubic root of 52161639 is about 373.6374588358.

The spelling of 52161639 in words is "fifty-two million, one hundred sixty-one thousand, six hundred thirty-nine".