56419381 has 4 divisors (see below), whose sum is σ = 56937100. Its totient is φ = 55901664.

The previous prime is 56419373. The next prime is 56419423. The reversal of 56419381 is 18391465.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18391465 = 5 ⋅3678293.

It can be written as a sum of positive squares in 2 ways, for example, as 23126481 + 33292900 = 4809^2 + 5770^2 .

It is a cyclic number.

It is not a de Polignac number, because 56419381 - 2³ = 56419373 is a prime.

It is a super-2 number, since 2×56419381² = 6366293104846322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56419381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56419301) 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, 258696 + ... + 258913.

It is an arithmetic number, because the mean of its divisors is an integer number (14234275).

Almost surely, 2^56419381 is an apocalyptic number.

It is an amenable number.

56419381 is a deficient number, since it is larger than the sum of its proper divisors (517719).

56419381 is a wasteful number, since it uses less digits than its factorization.

56419381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517718.

The product of its digits is 25920, while the sum is 37.

The square root of 56419381 is about 7511.2835787234. The cubic root of 56419381 is about 383.5389182468.

The spelling of 56419381 in words is "fifty-six million, four hundred nineteen thousand, three hundred eighty-one".