55878473 has 30 divisors (see below), whose sum is σ = 70938126. Its totient is φ = 43860096.

The previous prime is 55878437. The next prime is 55878479. The reversal of 55878473 is 37487855.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 39337984 + 16540489 = 6272^2 + 4067^2 .

It is not a de Polignac number, because 55878473 - 2⁶ = 55878409 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55878479) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1510211 + ... + 1510247.

Almost surely, 2^55878473 is an apocalyptic number.

It is an amenable number.

55878473 is a deficient number, since it is larger than the sum of its proper divisors (15059653).

55878473 is an frugal number, since it uses more digits than its factorization.

55878473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 61 counting only the distinct ones).

The product of its digits is 940800, while the sum is 47.

The square root of 55878473 is about 7475.1904992448. The cubic root of 55878473 is about 382.3092827975.

The spelling of 55878473 in words is "fifty-five million, eight hundred seventy-eight thousand, four hundred seventy-three".