1515149473 has 2 divisors, whose sum is σ = 1515149474. Its totient is φ = 1515149472.

The previous prime is 1515149431. The next prime is 1515149477. The reversal of 1515149473 is 3749415151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 773785489 + 741363984 = 27817^2 + 27228^2 .

It is a cyclic number.

It is not a de Polignac number, because 1515149473 - 2⁹ = 1515148961 is a prime.

It is not a weakly prime, because it can be changed into another prime (1515149477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 757574736 + 757574737.

It is an arithmetic number, because the mean of its divisors is an integer number (757574737).

Almost surely, 2^1515149473 is an apocalyptic number.

It is an amenable number.

1515149473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1515149473 is an equidigital number, since it uses as much as digits as its factorization.

1515149473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 40.

The square root of 1515149473 is about 38924.9209761561. The cubic root of 1515149473 is about 1148.5550782889. Note that the first 3 decimals are identical.

The spelling of 1515149473 in words is "one billion, five hundred fifteen million, one hundred forty-nine thousand, four hundred seventy-three".