15231121379 has 2 divisors, whose sum is σ = 15231121380. Its totient is φ = 15231121378.

The previous prime is 15231121327. The next prime is 15231121391. The reversal of 15231121379 is 97312113251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15231121379 - 2⁸ = 15231121123 is a prime.

It is not a weakly prime, because it can be changed into another prime (15231121579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7615560689 + 7615560690.

It is an arithmetic number, because the mean of its divisors is an integer number (7615560690).

Almost surely, 2^15231121379 is an apocalyptic number.

15231121379 is a deficient number, since it is larger than the sum of its proper divisors (1).

15231121379 is an equidigital number, since it uses as much as digits as its factorization.

15231121379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 35.

The spelling of 15231121379 in words is "fifteen billion, two hundred thirty-one million, one hundred twenty-one thousand, three hundred seventy-nine".