52138919 has 8 divisors (see below), whose sum is σ = 60973440. Its totient is φ = 43650936.

The previous prime is 52138901. The next prime is 52138937. The reversal of 52138919 is 91983125.

It is an interprime number because it is at equal distance from previous prime (52138901) and next prime (52138937).

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

It is a de Polignac number, because none of the positive numbers 2^k-52138919 is a prime.

It is a super-2 number, since 2×52138919² = 5436933748977122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52138319) 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, 86309 + ... + 86910.

It is an arithmetic number, because the mean of its divisors is an integer number (7621680).

Almost surely, 2^52138919 is an apocalyptic number.

52138919 is a deficient number, since it is larger than the sum of its proper divisors (8834521).

52138919 is a wasteful number, since it uses less digits than its factorization.

52138919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173269.

The product of its digits is 19440, while the sum is 38.

The square root of 52138919 is about 7220.7284258584. The cubic root of 52138919 is about 373.5832026426.

The spelling of 52138919 in words is "fifty-two million, one hundred thirty-eight thousand, nine hundred nineteen".