55147531 has 4 divisors (see below), whose sum is σ = 57049200. Its totient is φ = 53245864.

The previous prime is 55147529. The next prime is 55147553. The reversal of 55147531 is 13574155.

55147531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55147531 - 2¹ = 55147529 is a prime.

It is a super-2 number, since 2×55147531² = 6082500350791922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55147493 and 55147502.

It is not an unprimeable number, because it can be changed into a prime (55147571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 950791 + ... + 950848.

It is an arithmetic number, because the mean of its divisors is an integer number (14262300).

Almost surely, 2^55147531 is an apocalyptic number.

55147531 is a deficient number, since it is larger than the sum of its proper divisors (1901669).

55147531 is a wasteful number, since it uses less digits than its factorization.

55147531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901668.

The product of its digits is 10500, while the sum is 31.

The square root of 55147531 is about 7426.1383639143. The cubic root of 55147531 is about 380.6349748474.

The spelling of 55147531 in words is "fifty-five million, one hundred forty-seven thousand, five hundred thirty-one".