55509337 has 4 divisors (see below), whose sum is σ = 59779300. Its totient is φ = 51239376.

The previous prime is 55509331. The next prime is 55509341. The reversal of 55509337 is 73390555.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30349081 + 25160256 = 5509^2 + 5016^2 .

It is a cyclic number.

It is not a de Polignac number, because 55509337 - 2²³ = 47120729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55509296 and 55509305.

It is not an unprimeable number, because it can be changed into a prime (55509331) 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, 2134962 + ... + 2134987.

It is an arithmetic number, because the mean of its divisors is an integer number (14944825).

Almost surely, 2^55509337 is an apocalyptic number.

It is an amenable number.

55509337 is a deficient number, since it is larger than the sum of its proper divisors (4269963).

55509337 is a wasteful number, since it uses less digits than its factorization.

55509337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4269962.

The product of its (nonzero) digits is 70875, while the sum is 37.

The square root of 55509337 is about 7450.4588449303. The cubic root of 55509337 is about 381.4655707498.

The spelling of 55509337 in words is "fifty-five million, five hundred nine thousand, three hundred thirty-seven".