15123131049 has 8 divisors (see below), whose sum is σ = 21715265152. Its totient is φ = 9306542160.

The previous prime is 15123131017. The next prime is 15123131053. The reversal of 15123131049 is 94013132151.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15123131049 - 2⁵ = 15123131017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15123131059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193886257 + ... + 193886334.

It is an arithmetic number, because the mean of its divisors is an integer number (2714408144).

Almost surely, 2^15123131049 is an apocalyptic number.

It is an amenable number.

15123131049 is a deficient number, since it is larger than the sum of its proper divisors (6592134103).

15123131049 is a wasteful number, since it uses less digits than its factorization.

15123131049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387772607.

The product of its (nonzero) digits is 3240, while the sum is 30.

The spelling of 15123131049 in words is "fifteen billion, one hundred twenty-three million, one hundred thirty-one thousand, forty-nine".