15243256145 has 32 divisors (see below), whose sum is σ = 20091776544. Its totient is φ = 11033395200.

The previous prime is 15243256129. The next prime is 15243256151. The reversal of 15243256145 is 54165234251.

It can be written as a sum of positive squares in 16 ways, for example, as 9138021649 + 6105234496 = 95593^2 + 78136^2 .

It is not a de Polignac number, because 15243256145 - 2⁴ = 15243256129 is a prime.

It is a super-2 number, since 2×15243256145² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15243256099 and 15243256108.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1155185 + ... + 1168305.

It is an arithmetic number, because the mean of its divisors is an integer number (627868017).

Almost surely, 2^15243256145 is an apocalyptic number.

It is an amenable number.

15243256145 is a deficient number, since it is larger than the sum of its proper divisors (4848520399).

15243256145 is a wasteful number, since it uses less digits than its factorization.

15243256145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13493.

The product of its digits is 144000, while the sum is 38.

The spelling of 15243256145 in words is "fifteen billion, two hundred forty-three million, two hundred fifty-six thousand, one hundred forty-five".