15140431291 has 4 divisors (see below), whose sum is σ = 15332082400. Its totient is φ = 14948780184.

The previous prime is 15140431277. The next prime is 15140431297. The reversal of 15140431291 is 19213404151.

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 15140431291 - 2¹³ = 15140423099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15140431297) 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, 95825436 + ... + 95825593.

It is an arithmetic number, because the mean of its divisors is an integer number (3833020600).

Almost surely, 2^15140431291 is an apocalyptic number.

15140431291 is a deficient number, since it is larger than the sum of its proper divisors (191651109).

15140431291 is an equidigital number, since it uses as much as digits as its factorization.

15140431291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191651108.

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 15140431291 in words is "fifteen billion, one hundred forty million, four hundred thirty-one thousand, two hundred ninety-one".