55304531 has 4 divisors (see below), whose sum is σ = 56653464. Its totient is φ = 53955600.

The previous prime is 55304521. The next prime is 55304533. The reversal of 55304531 is 13540355.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13540355 = 5 ⋅2708071.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55304531 is a prime.

It is a super-2 number, since 2×55304531² = 6117182298259922, which contains 22 as substring.

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 55304531.

It is not an unprimeable number, because it can be changed into a prime (55304533) 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, 674405 + ... + 674486.

It is an arithmetic number, because the mean of its divisors is an integer number (14163366).

Almost surely, 2^55304531 is an apocalyptic number.

55304531 is a deficient number, since it is larger than the sum of its proper divisors (1348933).

55304531 is a wasteful number, since it uses less digits than its factorization.

55304531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348932.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 55304531 is about 7436.7016210145. The cubic root of 55304531 is about 380.9958436500.

Adding to 55304531 its reverse (13540355), we get a palindrome (68844886).

The spelling of 55304531 in words is "fifty-five million, three hundred four thousand, five hundred thirty-one".