55594981 has 8 divisors (see below), whose sum is σ = 63393624. Its totient is φ = 48299520.

The previous prime is 55594951. The next prime is 55594991. The reversal of 55594981 is 18949555.

It can be written as a sum of positive squares in 4 ways, for example, as 17956 + 55577025 = 134^2 + 7455^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55594981 - 2⁷ = 55594853 is a prime.

It is a super-2 number, since 2×55594981² = 6181603824780722, 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 (55594921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125560 + ... + 126001.

It is an arithmetic number, because the mean of its divisors is an integer number (7924203).

Almost surely, 2^55594981 is an apocalyptic number.

It is an amenable number.

55594981 is a deficient number, since it is larger than the sum of its proper divisors (7798643).

55594981 is a wasteful number, since it uses less digits than its factorization.

55594981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251591.

The product of its digits is 324000, while the sum is 46.

The square root of 55594981 is about 7456.2041951653. The cubic root of 55594981 is about 381.6616545768.

The spelling of 55594981 in words is "fifty-five million, five hundred ninety-four thousand, nine hundred eighty-one".