55913007 has 4 divisors (see below), whose sum is σ = 74550680. Its totient is φ = 37275336.

The previous prime is 55913003. The next prime is 55913009. The reversal of 55913007 is 70031955.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55913007 - 2² = 55913003 is a prime.

It is the 7478-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55913003) by changing a digit.

It is a nontrivial repunit in base 7477.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9318832 + ... + 9318837.

It is an arithmetic number, because the mean of its divisors is an integer number (18637670).

Almost surely, 2^55913007 is an apocalyptic number.

55913007 is a deficient number, since it is larger than the sum of its proper divisors (18637673).

55913007 is a wasteful number, since it uses less digits than its factorization.

55913007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18637672.

The product of its (nonzero) digits is 4725, while the sum is 30.

The square root of 55913007 is about 7477.5000501505. The cubic root of 55913007 is about 382.3880248076.

The spelling of 55913007 in words is "fifty-five million, nine hundred thirteen thousand, seven".