56251969 has 2 divisors, whose sum is σ = 56251970. Its totient is φ = 56251968.

The previous prime is 56251939. The next prime is 56251981. The reversal of 56251969 is 96915265.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54464400 + 1787569 = 7380^2 + 1337^2 .

It is a cyclic number.

It is not a de Polignac number, because 56251969 - 2¹³ = 56243777 is a prime.

It is a super-2 number, since 2×56251969² = 6328568032753922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56251919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28125984 + 28125985.

It is an arithmetic number, because the mean of its divisors is an integer number (28125985).

Almost surely, 2^56251969 is an apocalyptic number.

It is an amenable number.

56251969 is a deficient number, since it is larger than the sum of its proper divisors (1).

56251969 is an equidigital number, since it uses as much as digits as its factorization.

56251969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145800, while the sum is 43.

The square root of 56251969 is about 7500.1312655180. The cubic root of 56251969 is about 383.1591868506.

The spelling of 56251969 in words is "fifty-six million, two hundred fifty-one thousand, nine hundred sixty-nine".