55807814 has 4 divisors (see below), whose sum is σ = 83711724. Its totient is φ = 27903906.

The previous prime is 55807813. The next prime is 55807819. The reversal of 55807814 is 41870855.

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

It is a super-2 number, since 2×55807814² = 6229024206917192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55807813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13951952 + ... + 13951955.

It is an arithmetic number, because the mean of its divisors is an integer number (20927931).

Almost surely, 2^55807814 is an apocalyptic number.

55807814 is a deficient number, since it is larger than the sum of its proper divisors (27903910).

55807814 is a wasteful number, since it uses less digits than its factorization.

55807814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27903909.

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 55807814 is about 7470.4627701368. The cubic root of 55807814 is about 382.1480699338.

The spelling of 55807814 in words is "fifty-five million, eight hundred seven thousand, eight hundred fourteen".