55431506 has 8 divisors (see below), whose sum is σ = 89543244. Its totient is φ = 25583760.

The previous prime is 55431479. The next prime is 55431539. The reversal of 55431506 is 60513455.

55431506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 55428025 + 3481 = 7445^2 + 59^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 1065965 + ... + 1066016.

Almost surely, 2^55431506 is an apocalyptic number.

55431506 is a deficient number, since it is larger than the sum of its proper divisors (34111738).

55431506 is a wasteful number, since it uses less digits than its factorization.

55431506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131996.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 55431506 is about 7445.2337773907. The cubic root of 55431506 is about 381.2871999534.

The spelling of 55431506 in words is "fifty-five million, four hundred thirty-one thousand, five hundred six".