57550981 has 6 divisors (see below), whose sum is σ = 60739782. Its totient is φ = 54521640.

The previous prime is 57550963. The next prime is 57551023. The reversal of 57550981 is 18905575.

It can be written as a sum of positive squares in only one way, i.e., 54626881 + 2924100 = 7391^2 + 1710^2 .

It is not a de Polignac number, because 57550981 - 2¹⁷ = 57419909 is a prime.

It is a super-2 number, since 2×57550981² = 6624230828124722, 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 (57550081) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79350 + ... + 80071.

It is an arithmetic number, because the mean of its divisors is an integer number (10123297).

Almost surely, 2^57550981 is an apocalyptic number.

It is an amenable number.

57550981 is a deficient number, since it is larger than the sum of its proper divisors (3188801).

57550981 is a wasteful number, since it uses less digits than its factorization.

57550981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159459 (or 159440 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 40.

The square root of 57550981 is about 7586.2362868553. The cubic root of 57550981 is about 386.0861687588.

The spelling of 57550981 in words is "fifty-seven million, five hundred fifty thousand, nine hundred eighty-one".