55235240 has 16 divisors (see below), whose sum is σ = 124279380. Its totient is φ = 22094080.

The previous prime is 55235209. The next prime is 55235251. The reversal of 55235240 is 4253255.

It can be written as a sum of positive squares in 2 ways, for example, as 50154724 + 5080516 = 7082^2 + 2254^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690401 + ... + 690480.

Almost surely, 2^55235240 is an apocalyptic number.

It is an amenable number.

55235240 is an abundant number, since it is smaller than the sum of its proper divisors (69044140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55235240 is a wasteful number, since it uses less digits than its factorization.

55235240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380892 (or 1380888 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 55235240 is about 7432.0414422956. The cubic root of 55235240 is about 380.8366606950.

Adding to 55235240 its reverse (4253255), we get a palindrome (59488495).

The spelling of 55235240 in words is "fifty-five million, two hundred thirty-five thousand, two hundred forty".