55796981 has 4 divisors (see below), whose sum is σ = 55815372. Its totient is φ = 55778592.

The previous prime is 55796971. The next prime is 55796987. The reversal of 55796981 is 18969755.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10504081 + 45292900 = 3241^2 + 6730^2 .

It is a cyclic number.

It is not a de Polignac number, because 55796981 - 2¹⁸ = 55534837 is a prime.

It is a super-2 number, since 2×55796981² = 6226606177428722, 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 (55796987) 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, 3446 + ... + 11111.

It is an arithmetic number, because the mean of its divisors is an integer number (13953843).

Almost surely, 2^55796981 is an apocalyptic number.

It is an amenable number.

55796981 is a deficient number, since it is larger than the sum of its proper divisors (18391).

55796981 is a wasteful number, since it uses less digits than its factorization.

55796981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18390.

The product of its digits is 680400, while the sum is 50.

The square root of 55796981 is about 7469.7376794637. The cubic root of 55796981 is about 382.1233417482.

The spelling of 55796981 in words is "fifty-five million, seven hundred ninety-six thousand, nine hundred eighty-one".