56651431 has 4 divisors (see below), whose sum is σ = 57427552. Its totient is φ = 55875312.

The previous prime is 56651423. The next prime is 56651443. The reversal of 56651431 is 13415665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13415665 = 5 ⋅2683133.

It is a cyclic number.

It is not a de Polignac number, because 56651431 - 2³ = 56651423 is a prime.

It is a super-2 number, since 2×56651431² = 6418769268695522, 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 = 56651393 and 56651402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56651411) 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, 387951 + ... + 388096.

It is an arithmetic number, because the mean of its divisors is an integer number (14356888).

Almost surely, 2^56651431 is an apocalyptic number.

56651431 is a deficient number, since it is larger than the sum of its proper divisors (776121).

56651431 is an equidigital number, since it uses as much as digits as its factorization.

56651431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776120.

The product of its digits is 10800, while the sum is 31.

The square root of 56651431 is about 7526.7144890716. The cubic root of 56651431 is about 384.0640242458.

The spelling of 56651431 in words is "fifty-six million, six hundred fifty-one thousand, four hundred thirty-one".