56774381 has 4 divisors (see below), whose sum is σ = 58159164. Its totient is φ = 55389600.

The previous prime is 56774371. The next prime is 56774401. The reversal of 56774381 is 18347765.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18347765 = 5 ⋅3669553.

It can be written as a sum of positive squares in 2 ways, for example, as 3118756 + 53655625 = 1766^2 + 7325^2 .

It is a cyclic number.

It is not a de Polignac number, because 56774381 - 2¹⁰ = 56773357 is a prime.

It is a super-2 number, since 2×56774381² = 6446660675866322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 1384741 = 56774381 / (5 + 6 + 7 + 7 + 4 + 3 + 8 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56774351) 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, 692330 + ... + 692411.

It is an arithmetic number, because the mean of its divisors is an integer number (14539791).

Almost surely, 2^56774381 is an apocalyptic number.

It is an amenable number.

56774381 is a deficient number, since it is larger than the sum of its proper divisors (1384783).

56774381 is a wasteful number, since it uses less digits than its factorization.

56774381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384782.

The product of its digits is 141120, while the sum is 41.

The square root of 56774381 is about 7534.8776366972. The cubic root of 56774381 is about 384.3416668475.

The spelling of 56774381 in words is "fifty-six million, seven hundred seventy-four thousand, three hundred eighty-one".