53120831 has 2 divisors, whose sum is σ = 53120832. Its totient is φ = 53120830.

The previous prime is 53120803. The next prime is 53120839. The reversal of 53120831 is 13802135.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53120831 is a prime.

It is a super-2 number, since 2×53120831² = 5643645372261122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 53120797 and 53120806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53120839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26560415 + 26560416.

It is an arithmetic number, because the mean of its divisors is an integer number (26560416).

Almost surely, 2^53120831 is an apocalyptic number.

53120831 is a deficient number, since it is larger than the sum of its proper divisors (1).

53120831 is an equidigital number, since it uses as much as digits as its factorization.

53120831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 53120831 is about 7288.4038719050. The cubic root of 53120831 is about 375.9138152210.

Adding to 53120831 its reverse (13802135), we get a palindrome (66922966).

The spelling of 53120831 in words is "fifty-three million, one hundred twenty thousand, eight hundred thirty-one".