55422687 has 8 divisors (see below), whose sum is σ = 74832640. Its totient is φ = 36480600.

The previous prime is 55422659. The next prime is 55422713. The reversal of 55422687 is 78622455.

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

It is a de Polignac number, because none of the positive numbers 2^k-55422687 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 (55422187) 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, 116689 + ... + 117162.

It is an arithmetic number, because the mean of its divisors is an integer number (9354080).

Almost surely, 2^55422687 is an apocalyptic number.

55422687 is a deficient number, since it is larger than the sum of its proper divisors (19409953).

55422687 is a wasteful number, since it uses less digits than its factorization.

55422687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233933.

The product of its digits is 134400, while the sum is 39.

The square root of 55422687 is about 7444.6414957337. The cubic root of 55422687 is about 381.2669782997.

The spelling of 55422687 in words is "fifty-five million, four hundred twenty-two thousand, six hundred eighty-seven".