55477407 has 8 divisors (see below), whose sum is σ = 75074176. Its totient is φ = 36432792.

The previous prime is 55477399. The next prime is 55477421. The reversal of 55477407 is 70477455.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55477407 - 2³ = 55477399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55478407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137803 + ... + 138204.

It is an arithmetic number, because the mean of its divisors is an integer number (9384272).

Almost surely, 2^55477407 is an apocalyptic number.

55477407 is a deficient number, since it is larger than the sum of its proper divisors (19596769).

55477407 is a wasteful number, since it uses less digits than its factorization.

55477407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276077.

The product of its (nonzero) digits is 137200, while the sum is 39.

The square root of 55477407 is about 7448.3157156501. The cubic root of 55477407 is about 381.3924146977.

The spelling of 55477407 in words is "fifty-five million, four hundred seventy-seven thousand, four hundred seven".