55239130 has 8 divisors (see below), whose sum is σ = 99430452. Its totient is φ = 22095648.

The previous prime is 55239101. The next prime is 55239139. The reversal of 55239130 is 3193255.

It can be written as a sum of positive squares in 2 ways, for example, as 53392249 + 1846881 = 7307^2 + 1359^2 .

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

It is a super-2 number, since 2×55239130² = 6102722966313800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55239139) 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, 2761947 + ... + 2761966.

Almost surely, 2^55239130 is an apocalyptic number.

55239130 is a deficient number, since it is larger than the sum of its proper divisors (44191322).

55239130 is a wasteful number, since it uses less digits than its factorization.

55239130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5523920.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 55239130 is about 7432.3031423644. The cubic root of 55239130 is about 380.8456007595.

The spelling of 55239130 in words is "fifty-five million, two hundred thirty-nine thousand, one hundred thirty".