1531147039 has 2 divisors, whose sum is σ = 1531147040. Its totient is φ = 1531147038.

The previous prime is 1531147027. The next prime is 1531147049. The reversal of 1531147039 is 9307411351.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1531147039 is a prime.

It is a super-2 number, since 2×1531147039² = 4688822510076935042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1531146995 and 1531147013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1531147049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765573519 + 765573520.

It is an arithmetic number, because the mean of its divisors is an integer number (765573520).

Almost surely, 2^1531147039 is an apocalyptic number.

1531147039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531147039 is an equidigital number, since it uses as much as digits as its factorization.

1531147039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 1531147039 is about 39129.8739967304. The cubic root of 1531147039 is about 1152.5832386869.

The spelling of 1531147039 in words is "one billion, five hundred thirty-one million, one hundred forty-seven thousand, thirty-nine".