56081961 has 24 divisors (see below), whose sum is σ = 87851400. Its totient is φ = 34269696.

The previous prime is 56081959. The next prime is 56081999. The reversal of 56081961 is 16918065.

56081961 is a `hidden beast` number, since 560 + 8 + 1 + 96 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2499561 + 53582400 = 1581^2 + 7320^2 .

It is not a de Polignac number, because 56081961 - 2¹ = 56081959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56081941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15825 + ... + 19041.

It is an arithmetic number, because the mean of its divisors is an integer number (3660475).

Almost surely, 2^56081961 is an apocalyptic number.

It is an amenable number.

56081961 is a deficient number, since it is larger than the sum of its proper divisors (31769439).

56081961 is a wasteful number, since it uses less digits than its factorization.

56081961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3385 (or 3382 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 56081961 is about 7488.7890209299. The cubic root of 56081961 is about 382.7727952745.

It can be divided in two parts, 5608 and 1961, that added together give a square (7569 = 87²).

The spelling of 56081961 in words is "fifty-six million, eighty-one thousand, nine hundred sixty-one".