55431497 has 4 divisors (see below), whose sum is σ = 60470736. Its totient is φ = 50392260.

The previous prime is 55431479. The next prime is 55431539. The reversal of 55431497 is 79413455.

55431497 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55431497 - 2⁸ = 55431241 is a prime.

It is a super-2 number, since 2×55431497² = 6145301719322018, 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 55431497.

It is not an unprimeable number, because it can be changed into a prime (55431097) 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, 2519603 + ... + 2519624.

It is an arithmetic number, because the mean of its divisors is an integer number (15117684).

Almost surely, 2^55431497 is an apocalyptic number.

It is an amenable number.

55431497 is a deficient number, since it is larger than the sum of its proper divisors (5039239).

55431497 is a wasteful number, since it uses less digits than its factorization.

55431497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5039238.

The product of its digits is 75600, while the sum is 38.

The square root of 55431497 is about 7445.2331729772. The cubic root of 55431497 is about 381.2871793178.

The spelling of 55431497 in words is "fifty-five million, four hundred thirty-one thousand, four hundred ninety-seven".