55031530 has 16 divisors (see below), whose sum is σ = 99782280. Its totient is φ = 21851392.

The previous prime is 55031527. The next prime is 55031551. The reversal of 55031530 is 3513055.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 54567769 + 463761 = 7387^2 + 681^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18715 + ... + 21454.

Almost surely, 2^55031530 is an apocalyptic number.

55031530 is a deficient number, since it is larger than the sum of its proper divisors (44750750).

55031530 is a wasteful number, since it uses less digits than its factorization.

55031530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40313.

The product of its (nonzero) digits is 1125, while the sum is 22.

The square root of 55031530 is about 7418.3239346904. The cubic root of 55031530 is about 380.3679031581.

Adding to 55031530 its reverse (3513055), we get a palindrome (58544585).

The spelling of 55031530 in words is "fifty-five million, thirty-one thousand, five hundred thirty".