55811478 has 16 divisors (see below), whose sum is σ = 116476416. Its totient is φ = 17794920.

The previous prime is 55811453. The next prime is 55811543. The reversal of 55811478 is 87411855.

It is a super-2 number, since 2×55811478² = 6229842153088968, which contains 22 as substring.

It is a Curzon number.

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, 202078 + ... + 202353.

It is an arithmetic number, because the mean of its divisors is an integer number (7279776).

Almost surely, 2^55811478 is an apocalyptic number.

55811478 is an abundant number, since it is smaller than the sum of its proper divisors (60664938).

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

55811478 is a wasteful number, since it uses less digits than its factorization.

55811478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404459.

The product of its digits is 44800, while the sum is 39.

The square root of 55811478 is about 7470.7079985768. The cubic root of 55811478 is about 382.1564329197.

The spelling of 55811478 in words is "fifty-five million, eight hundred eleven thousand, four hundred seventy-eight".