55140325 has 6 divisors (see below), whose sum is σ = 68374034. Its totient is φ = 44112240.

The previous prime is 55140311. The next prime is 55140347. The reversal of 55140325 is 52304155.

It can be written as a sum of positive squares in 3 ways, for example, as 276676 + 54863649 = 526^2 + 7407^2 .

It is a de Polignac number, because none of the positive numbers 2^k-55140325 is a prime.

It is a super-2 number, since 2×55140325² = 6080910882211250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 2205613 = 55140325 / (5 + 5 + 1 + 4 + 0 + 3 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55140325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1102782 + ... + 1102831.

Almost surely, 2^55140325 is an apocalyptic number.

It is an amenable number.

55140325 is a deficient number, since it is larger than the sum of its proper divisors (13233709).

55140325 is a wasteful number, since it uses less digits than its factorization.

55140325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2205623 (or 2205618 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 55140325 is about 7425.6531699238. The cubic root of 55140325 is about 380.6183952287.

The spelling of 55140325 in words is "fifty-five million, one hundred forty thousand, three hundred twenty-five".