1531479031 has 2 divisors, whose sum is σ = 1531479032. Its totient is φ = 1531479030.

The previous prime is 1531478987. The next prime is 1531479041. The reversal of 1531479031 is 1309741351.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1531479031 - 2¹⁵ = 1531446263 is a prime.

It is a super-2 number, since 2×1531479031² = 4690856044785397922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1531479041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765739515 + 765739516.

It is an arithmetic number, because the mean of its divisors is an integer number (765739516).

Almost surely, 2^1531479031 is an apocalyptic number.

1531479031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531479031 is an equidigital number, since it uses as much as digits as its factorization.

1531479031 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1531479031 is about 39134.1159475974. The cubic root of 1531479031 is about 1152.6665358823. Note that the first 3 decimals are identical.

The spelling of 1531479031 in words is "one billion, five hundred thirty-one million, four hundred seventy-nine thousand, thirty-one".