15122142431 has 4 divisors (see below), whose sum is σ = 16496882664. Its totient is φ = 13747402200.

The previous prime is 15122142383. The next prime is 15122142449. The reversal of 15122142431 is 13424122151.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15122142431 is a prime.

It is a super-2 number, since 2×15122142431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15122142431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15122142031) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 687370100 + ... + 687370121.

It is an arithmetic number, because the mean of its divisors is an integer number (4124220666).

Almost surely, 2^15122142431 is an apocalyptic number.

15122142431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

15122142431 is a deficient number, since it is larger than the sum of its proper divisors (1374740233).

15122142431 is a wasteful number, since it uses less digits than its factorization.

15122142431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374740232.

The product of its digits is 1920, while the sum is 26.

Adding to 15122142431 its reverse (13424122151), we get a palindrome (28546264582).

The spelling of 15122142431 in words is "fifteen billion, one hundred twenty-two million, one hundred forty-two thousand, four hundred thirty-one".