15431161142 has 4 divisors (see below), whose sum is σ = 23146741716. Its totient is φ = 7715580570.

The previous prime is 15431161129. The next prime is 15431161153. The reversal of 15431161142 is 24116113451.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3857790284 + ... + 3857790287.

It is an arithmetic number, because the mean of its divisors is an integer number (5786685429).

Almost surely, 2^15431161142 is an apocalyptic number.

15431161142 is a deficient number, since it is larger than the sum of its proper divisors (7715580574).

15431161142 is an equidigital number, since it uses as much as digits as its factorization.

15431161142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7715580573.

The product of its digits is 2880, while the sum is 29.

Adding to 15431161142 its reverse (24116113451), we get a palindrome (39547274593).

The spelling of 15431161142 in words is "fifteen billion, four hundred thirty-one million, one hundred sixty-one thousand, one hundred forty-two".