55481405 has 32 divisors (see below), whose sum is σ = 81381888. Its totient is φ = 35502720.

The previous prime is 55481383. The next prime is 55481429. The reversal of 55481405 is 50418455.

55481405 = 1242² + 1243² + ... + 1276².

55481405 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 55481405 - 2⁶ = 55481341 is a prime.

It is a Smith number, since the sum of its digits (32) 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 31 ways as a sum of consecutive naturals, for example, 1353185 + ... + 1353225.

It is an arithmetic number, because the mean of its divisors is an integer number (2543184).

Almost surely, 2^55481405 is an apocalyptic number.

It is an amenable number.

55481405 is a deficient number, since it is larger than the sum of its proper divisors (25900483).

55481405 is an frugal number, since it uses more digits than its factorization.

55481405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 55481405 is about 7448.5840936382. The cubic root of 55481405 is about 381.4015762065.

The spelling of 55481405 in words is "fifty-five million, four hundred eighty-one thousand, four hundred five".