52991121 has 8 divisors (see below), whose sum is σ = 72934144. Its totient is φ = 34187760.

The previous prime is 52991083. The next prime is 52991123. The reversal of 52991121 is 12119925.

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

It is not a de Polignac number, because 52991121 - 2¹⁰ = 52990097 is a prime.

It is the 7280-th Hogben number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52991123) by changing a digit.

It is a nontrivial repunit in base 7279.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284806 + ... + 284991.

It is an arithmetic number, because the mean of its divisors is an integer number (9116768).

Almost surely, 2^52991121 is an apocalyptic number.

It is an amenable number.

52991121 is a deficient number, since it is larger than the sum of its proper divisors (19943023).

52991121 is a wasteful number, since it uses less digits than its factorization.

52991121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569831.

The product of its digits is 1620, while the sum is 30.

The square root of 52991121 is about 7279.5000515145. The cubic root of 52991121 is about 375.6075981115.

The spelling of 52991121 in words is "fifty-two million, nine hundred ninety-one thousand, one hundred twenty-one".