55241640 has 48 divisors (see below), whose sum is σ = 179536500. Its totient is φ = 14731008.

The previous prime is 55241623. The next prime is 55241663. The reversal of 55241640 is 4614255.

It can be written as a sum of positive squares in 2 ways, for example, as 46703556 + 8538084 = 6834^2 + 2922^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76365 + ... + 77084.

Almost surely, 2^55241640 is an apocalyptic number.

It is an amenable number.

55241640 is an abundant number, since it is smaller than the sum of its proper divisors (124294860).

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

55241640 is a wasteful number, since it uses less digits than its factorization.

55241640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153466 (or 153459 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 55241640 is about 7432.4719979291. The cubic root of 55241640 is about 380.8513690617.

Adding to 55241640 its reverse (4614255), we get a palindrome (59855895).

The spelling of 55241640 in words is "fifty-five million, two hundred forty-one thousand, six hundred forty".