56180381 has 6 divisors (see below), whose sum is σ = 56512890. Its totient is φ = 55849056.

The previous prime is 56180353. The next prime is 56180387. The reversal of 56180381 is 18308165.

It can be written as a sum of positive squares in 3 ways, for example, as 14784025 + 41396356 = 3845^2 + 6434^2 .

It is not a de Polignac number, because 56180381 - 2¹⁸ = 55918237 is a prime.

It is a super-2 number, since 2×56180381² = 6312470418610322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56180387) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 122705 + ... + 123161.

It is an arithmetic number, because the mean of its divisors is an integer number (9418815).

Almost surely, 2^56180381 is an apocalyptic number.

It is an amenable number.

56180381 is a deficient number, since it is larger than the sum of its proper divisors (332509).

56180381 is an frugal number, since it uses more digits than its factorization.

56180381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 56180381 is about 7495.3572963535. The cubic root of 56180381 is about 382.9965777633.

The spelling of 56180381 in words is "fifty-six million, one hundred eighty thousand, three hundred eighty-one".