52156821 has 8 divisors (see below), whose sum is σ = 70495360. Its totient is φ = 34294752.

The previous prime is 52156781. The next prime is 52156837. The reversal of 52156821 is 12865125.

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

It is not a de Polignac number, because 52156821 - 2⁷ = 52156693 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 (52156921) 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, 118861 + ... + 119298.

It is an arithmetic number, because the mean of its divisors is an integer number (8811920).

Almost surely, 2^52156821 is an apocalyptic number.

It is an amenable number.

52156821 is a deficient number, since it is larger than the sum of its proper divisors (18338539).

52156821 is a wasteful number, since it uses less digits than its factorization.

52156821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238235.

The product of its digits is 4800, while the sum is 30.

The square root of 52156821 is about 7221.9679450964. The cubic root of 52156821 is about 373.6259545916.

The spelling of 52156821 in words is "fifty-two million, one hundred fifty-six thousand, eight hundred twenty-one".