55431501 has 4 divisors (see below), whose sum is σ = 73908672. Its totient is φ = 36954332.

The previous prime is 55431479. The next prime is 55431539. The reversal of 55431501 is 10513455.

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 55431501 - 2¹⁸ = 55169357 is a prime.

It is a super-2 number, since 2×55431501² = 6145302606226002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55436501) 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, 9238581 + ... + 9238586.

It is an arithmetic number, because the mean of its divisors is an integer number (18477168).

Almost surely, 2^55431501 is an apocalyptic number.

It is an amenable number.

55431501 is a deficient number, since it is larger than the sum of its proper divisors (18477171).

55431501 is a wasteful number, since it uses less digits than its factorization.

55431501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18477170.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 55431501 is about 7445.2334416054. The cubic root of 55431501 is about 381.2871884892.

Adding to 55431501 its reverse (10513455), we get a palindrome (65944956).

The spelling of 55431501 in words is "fifty-five million, four hundred thirty-one thousand, five hundred one".