1515742225 has 12 divisors (see below), whose sum is σ = 1881474444. Its totient is φ = 1211333120.

The previous prime is 1515742211. The next prime is 1515742229. The reversal of 1515742225 is 5222475151.

It can be written as a sum of positive squares in 6 ways, for example, as 5875776 + 1509866449 = 2424^2 + 38857^2 .

It is not a de Polignac number, because 1515742225 - 2⁷ = 1515742097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1515742229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6604 + ... + 55453.

It is an arithmetic number, because the mean of its divisors is an integer number (156789537).

Almost surely, 2^1515742225 is an apocalyptic number.

It is an amenable number.

1515742225 is a deficient number, since it is larger than the sum of its proper divisors (365732219).

1515742225 is an equidigital number, since it uses as much as digits as its factorization.

1515742225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63044 (or 63039 counting only the distinct ones).

The product of its digits is 28000, while the sum is 34.

The square root of 1515742225 is about 38932.5342740490. The cubic root of 1515742225 is about 1148.7048367934.

The spelling of 1515742225 in words is "one billion, five hundred fifteen million, seven hundred forty-two thousand, two hundred twenty-five".