55554681 has 32 divisors (see below), whose sum is σ = 93049600. Its totient is φ = 29296512.

The previous prime is 55554677. The next prime is 55554701. The reversal of 55554681 is 18645555.

It is not a de Polignac number, because 55554681 - 2² = 55554677 is a prime.

It is a super-2 number, since 2×55554681² = 6172645162023522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (55554641) 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, 11301 + ... + 15453.

It is an arithmetic number, because the mean of its divisors is an integer number (2907800).

Almost surely, 2^55554681 is an apocalyptic number.

It is an amenable number.

55554681 is a deficient number, since it is larger than the sum of its proper divisors (37494919).

55554681 is a wasteful number, since it uses less digits than its factorization.

55554681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4190 (or 4176 counting only the distinct ones).

The product of its digits is 120000, while the sum is 39.

The square root of 55554681 is about 7453.5012577982. The cubic root of 55554681 is about 381.5694119415.

The spelling of 55554681 in words is "fifty-five million, five hundred fifty-four thousand, six hundred eighty-one".