56162761 has 4 divisors (see below), whose sum is σ = 57083524. Its totient is φ = 55242000.

The previous prime is 56162753. The next prime is 56162779. The reversal of 56162761 is 16726165.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16726165 = 5 ⋅3345233.

It can be written as a sum of positive squares in 2 ways, for example, as 14107536 + 42055225 = 3756^2 + 6485^2 .

It is a cyclic number.

It is not a de Polignac number, because 56162761 - 2³ = 56162753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56162741) 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, 460290 + ... + 460411.

It is an arithmetic number, because the mean of its divisors is an integer number (14270881).

Almost surely, 2^56162761 is an apocalyptic number.

56162761 is the 3352-nd centered decagonal number.

It is an amenable number.

56162761 is a deficient number, since it is larger than the sum of its proper divisors (920763).

56162761 is an equidigital number, since it uses as much as digits as its factorization.

56162761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920762.

The product of its digits is 15120, while the sum is 34.

The square root of 56162761 is about 7494.1818099109. The cubic root of 56162761 is about 382.9565335034.

The spelling of 56162761 in words is "fifty-six million, one hundred sixty-two thousand, seven hundred sixty-one".