52128331 has 4 divisors (see below), whose sum is σ = 52186464. Its totient is φ = 52070200.

The previous prime is 52128299. The next prime is 52128347. The reversal of 52128331 is 13382125.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 52128331 - 2⁵ = 52128299 is a prime.

It is a super-2 number, since 2×52128331² = 5434725785691122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52128296 and 52128305.

It is not an unprimeable number, because it can be changed into a prime (52128361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27700 + ... + 29521.

It is an arithmetic number, because the mean of its divisors is an integer number (13046616).

Almost surely, 2^52128331 is an apocalyptic number.

52128331 is a deficient number, since it is larger than the sum of its proper divisors (58133).

52128331 is an equidigital number, since it uses as much as digits as its factorization.

52128331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58132.

The product of its digits is 1440, while the sum is 25.

The square root of 52128331 is about 7219.9952216051. The cubic root of 52128331 is about 373.5579127261.

The spelling of 52128331 in words is "fifty-two million, one hundred twenty-eight thousand, three hundred thirty-one".