56840831 has 2 divisors, whose sum is σ = 56840832. Its totient is φ = 56840830.

The previous prime is 56840821. The next prime is 56840851. The reversal of 56840831 is 13804865.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56840831 - 2¹⁴ = 56824447 is a prime.

It is a super-2 number, since 2×56840831² = 6461760137541122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56840791 and 56840800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56840821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28420415 + 28420416.

It is an arithmetic number, because the mean of its divisors is an integer number (28420416).

Almost surely, 2^56840831 is an apocalyptic number.

56840831 is a deficient number, since it is larger than the sum of its proper divisors (1).

56840831 is an equidigital number, since it uses as much as digits as its factorization.

56840831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 56840831 is about 7539.2858415105. The cubic root of 56840831 is about 384.4915557339.

The spelling of 56840831 in words is "fifty-six million, eight hundred forty thousand, eight hundred thirty-one".