52121839 has 36 divisors (see below), whose sum is σ = 68229000. Its totient is φ = 39658080.

The previous prime is 52121827. The next prime is 52121851. The reversal of 52121839 is 93812125.

52121839 = T₁₄₃₄ + T₁₄₃₅ + ... + T₁₄₈₂.

It is an interprime number because it is at equal distance from previous prime (52121827) and next prime (52121851).

It is not a de Polignac number, because 52121839 - 2⁹ = 52121327 is a prime.

It is a super-2 number, since 2×52121839² = 5433372201483842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 52121839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52121809) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 349737 + ... + 349885.

It is an arithmetic number, because the mean of its divisors is an integer number (1895250).

Almost surely, 2^52121839 is an apocalyptic number.

52121839 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

52121839 is a deficient number, since it is larger than the sum of its proper divisors (16107161).

52121839 is a wasteful number, since it uses less digits than its factorization.

52121839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 226 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 52121839 is about 7219.5456228214. The cubic root of 52121839 is about 373.5424045971.

The spelling of 52121839 in words is "fifty-two million, one hundred twenty-one thousand, eight hundred thirty-nine".