55158307 has 4 divisors (see below), whose sum is σ = 56331936. Its totient is φ = 53984680.

The previous prime is 55158281. The next prime is 55158329. The reversal of 55158307 is 70385155.

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

It is a cyclic number.

It is not a de Polignac number, because 55158307 - 2²³ = 46769699 is a prime.

It is a super-2 number, since 2×55158307² = 6084877662212498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55158707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 586744 + ... + 586837.

It is an arithmetic number, because the mean of its divisors is an integer number (14082984).

Almost surely, 2^55158307 is an apocalyptic number.

55158307 is a deficient number, since it is larger than the sum of its proper divisors (1173629).

55158307 is a wasteful number, since it uses less digits than its factorization.

55158307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173628.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 55158307 is about 7426.8638738030. The cubic root of 55158307 is about 380.6597656542.

The spelling of 55158307 in words is "fifty-five million, one hundred fifty-eight thousand, three hundred seven".