55802981 has 16 divisors (see below), whose sum is σ = 63705600. Its totient is φ = 48454848.

The previous prime is 55802969. The next prime is 55803001. The reversal of 55802981 is 18920855.

It is not a de Polignac number, because 55802981 - 2⁶ = 55802917 is a prime.

It is a super-2 number, since 2×55802981² = 6227945376972722, 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 (55802941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38060 + ... + 39498.

It is an arithmetic number, because the mean of its divisors is an integer number (3981600).

Almost surely, 2^55802981 is an apocalyptic number.

It is an amenable number.

55802981 is a deficient number, since it is larger than the sum of its proper divisors (7902619).

55802981 is a wasteful number, since it uses less digits than its factorization.

55802981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628.

The product of its (nonzero) digits is 28800, while the sum is 38.

The square root of 55802981 is about 7470.1392891967. The cubic root of 55802981 is about 382.1370381755.

The spelling of 55802981 in words is "fifty-five million, eight hundred two thousand, nine hundred eighty-one".