54181556 has 24 divisors (see below), whose sum is σ = 111395424. Its totient is φ = 22733280.

The previous prime is 54181507. The next prime is 54181571. The reversal of 54181556 is 65518145.

It is a happy number.

It is a super-2 number, since 2×54181556² = 5871282021162272, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46790 + ... + 47933.

It is an arithmetic number, because the mean of its divisors is an integer number (4641476).

Almost surely, 2^54181556 is an apocalyptic number.

It is an amenable number.

54181556 is an abundant number, since it is smaller than the sum of its proper divisors (57213868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

54181556 is a wasteful number, since it uses less digits than its factorization.

54181556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94751 (or 94749 counting only the distinct ones).

The product of its digits is 24000, while the sum is 35.

The square root of 54181556 is about 7360.8121834482. The cubic root of 54181556 is about 378.3994452358.

The spelling of 54181556 in words is "fifty-four million, one hundred eighty-one thousand, five hundred fifty-six".