431255544022491 has 4 divisors (see below), whose sum is σ = 575007392029992. Its totient is φ = 287503696014992.

The previous prime is 431255544022451. The next prime is 431255544022519. The reversal of 431255544022491 is 194220445552134.

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 431255544022491 - 2⁴² = 426857497511387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (431255544022441) 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, 71875924003746 + ... + 71875924003751.

It is an arithmetic number, because the mean of its divisors is an integer number (143751848007498).

Almost surely, 2^{431255544022491} is an apocalyptic number.

431255544022491 is a deficient number, since it is larger than the sum of its proper divisors (143751848007501).

431255544022491 is a wasteful number, since it uses less digits than its factorization.

431255544022491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143751848007500.

The product of its (nonzero) digits is 6912000, while the sum is 51.

The spelling of 431255544022491 in words is "four hundred thirty-one trillion, two hundred fifty-five billion, five hundred forty-four million, twenty-two thousand, four hundred ninety-one".