554919981 has 32 divisors (see below), whose sum is σ = 930969600. Its totient is φ = 285612480.

The previous prime is 554919977. The next prime is 554919983. The reversal of 554919981 is 189919455.

It is not a de Polignac number, because 554919981 - 2² = 554919977 is a prime.

It is a super-2 number, since 2×554919981² = 615872370626080722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (554919983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14160 + ... + 36198.

It is an arithmetic number, because the mean of its divisors is an integer number (29092800).

Almost surely, 2^554919981 is an apocalyptic number.

It is an amenable number.

554919981 is a deficient number, since it is larger than the sum of its proper divisors (376049619).

554919981 is a wasteful number, since it uses less digits than its factorization.

554919981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22169.

The product of its digits is 583200, while the sum is 51.

The square root of 554919981 is about 23556.7396088678. The cubic root of 554919981 is about 821.7570794902.

The spelling of 554919981 in words is "five hundred fifty-four million, nine hundred nineteen thousand, nine hundred eighty-one".