55815814 has 4 divisors (see below), whose sum is σ = 83723724. Its totient is φ = 27907906.

The previous prime is 55815769. The next prime is 55815817. The reversal of 55815814 is 41851855.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55815817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13953952 + ... + 13953955.

It is an arithmetic number, because the mean of its divisors is an integer number (20930931).

Almost surely, 2^55815814 is an apocalyptic number.

55815814 is a deficient number, since it is larger than the sum of its proper divisors (27907910).

55815814 is a wasteful number, since it uses less digits than its factorization.

55815814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27907909.

The product of its digits is 32000, while the sum is 37.

The square root of 55815814 is about 7470.9981930128. The cubic root of 55815814 is about 382.1663292555.

The spelling of 55815814 in words is "fifty-five million, eight hundred fifteen thousand, eight hundred fourteen".