55509730 has 8 divisors (see below), whose sum is σ = 99917532. Its totient is φ = 22203888.

The previous prime is 55509719. The next prime is 55509733. The reversal of 55509730 is 3790555.

It can be written as a sum of positive squares in 2 ways, for example, as 53597041 + 1912689 = 7321^2 + 1383^2 .

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

It is not an unprimeable number, because it can be changed into a prime (55509733) 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, 2775477 + ... + 2775496.

Almost surely, 2^55509730 is an apocalyptic number.

55509730 is a deficient number, since it is larger than the sum of its proper divisors (44407802).

55509730 is a wasteful number, since it uses less digits than its factorization.

55509730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5550980.

The product of its (nonzero) digits is 23625, while the sum is 34.

The square root of 55509730 is about 7450.4852190981. The cubic root of 55509730 is about 381.4664709924.

The spelling of 55509730 in words is "fifty-five million, five hundred nine thousand, seven hundred thirty".