514431391 has 4 divisors (see below), whose sum is σ = 531025984. Its totient is φ = 497836800.

The previous prime is 514431389. The next prime is 514431413. The reversal of 514431391 is 193134415.

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 514431391 - 2¹ = 514431389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 16594561 = 514431391 / (5 + 1 + 4 + 4 + 3 + 1 + 3 + 9 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (514431311) 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, 8297250 + ... + 8297311.

It is an arithmetic number, because the mean of its divisors is an integer number (132756496).

Almost surely, 2^514431391 is an apocalyptic number.

514431391 is a deficient number, since it is larger than the sum of its proper divisors (16594593).

514431391 is a wasteful number, since it uses less digits than its factorization.

514431391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16594592.

The product of its digits is 6480, while the sum is 31.

The square root of 514431391 is about 22681.0800227855. The cubic root of 514431391 is about 801.2643501997.

The spelling of 514431391 in words is "five hundred fourteen million, four hundred thirty-one thousand, three hundred ninety-one".