53121031 has 2 divisors, whose sum is σ = 53121032. Its totient is φ = 53121030.

The previous prime is 53121001. The next prime is 53121037. The reversal of 53121031 is 13012135.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53121031 - 2⁹ = 53120519 is a prime.

It is a super-2 number, since 2×53121031² = 5643687869005922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 53120996 and 53121014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53121037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26560515 + 26560516.

It is an arithmetic number, because the mean of its divisors is an integer number (26560516).

Almost surely, 2^53121031 is an apocalyptic number.

53121031 is a deficient number, since it is larger than the sum of its proper divisors (1).

53121031 is an equidigital number, since it uses as much as digits as its factorization.

53121031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 53121031 is about 7288.4175923173. The cubic root of 53121031 is about 375.9142869924.

Adding to 53121031 its reverse (13012135), we get a palindrome (66133166).

The spelling of 53121031 in words is "fifty-three million, one hundred twenty-one thousand, thirty-one".