56381431 has 8 divisors (see below), whose sum is σ = 57337920. Its totient is φ = 55431168.

The previous prime is 56381419. The next prime is 56381443. The reversal of 56381431 is 13418365.

It is an interprime number because it is at equal distance from previous prime (56381419) and next prime (56381443).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56381431 - 2⁵ = 56381399 is a prime.

It is a super-2 number, since 2×56381431² = 6357731523215522, 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 = 56381393 and 56381402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56381491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18915 + ... + 21691.

It is an arithmetic number, because the mean of its divisors is an integer number (7167240).

Almost surely, 2^56381431 is an apocalyptic number.

56381431 is a deficient number, since it is larger than the sum of its proper divisors (956489).

56381431 is a wasteful number, since it uses less digits than its factorization.

56381431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3113.

The product of its digits is 8640, while the sum is 31.

The square root of 56381431 is about 7508.7569543833. The cubic root of 56381431 is about 383.4529042660.

Adding to 56381431 its reverse (13418365), we get a palindrome (69799796).

The spelling of 56381431 in words is "fifty-six million, three hundred eighty-one thousand, four hundred thirty-one".