55772481 has 16 divisors (see below), whose sum is σ = 77126400. Its totient is φ = 35806848.

The previous prime is 55772477. The next prime is 55772501. The reversal of 55772481 is 18427755.

It is not a de Polignac number, because 55772481 - 2² = 55772477 is a prime.

It is a super-2 number, since 2×55772481² = 6221139273790722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55772411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53160 + ... + 54198.

It is an arithmetic number, because the mean of its divisors is an integer number (4820400).

Almost surely, 2^55772481 is an apocalyptic number.

It is an amenable number.

55772481 is a deficient number, since it is larger than the sum of its proper divisors (21353919).

55772481 is a wasteful number, since it uses less digits than its factorization.

55772481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688.

The product of its digits is 78400, while the sum is 39.

The square root of 55772481 is about 7468.0975489076. The cubic root of 55772481 is about 382.0674044777.

The spelling of 55772481 in words is "fifty-five million, seven hundred seventy-two thousand, four hundred eighty-one".