55405707 has 8 divisors (see below), whose sum is σ = 84427776. Its totient is φ = 31660392.

The previous prime is 55405699. The next prime is 55405709. The reversal of 55405707 is 70750455.

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

It is not a de Polignac number, because 55405707 - 2³ = 55405699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55405709) 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, 1319163 + ... + 1319204.

It is an arithmetic number, because the mean of its divisors is an integer number (10553472).

Almost surely, 2^55405707 is an apocalyptic number.

55405707 is a deficient number, since it is larger than the sum of its proper divisors (29022069).

55405707 is a wasteful number, since it uses less digits than its factorization.

55405707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2638377.

The product of its (nonzero) digits is 24500, while the sum is 33.

The square root of 55405707 is about 7443.5009907973. The cubic root of 55405707 is about 381.2280377208.

The spelling of 55405707 in words is "fifty-five million, four hundred five thousand, seven hundred seven".