1531257107 has 2 divisors, whose sum is σ = 1531257108. Its totient is φ = 1531257106.

The previous prime is 1531257103. The next prime is 1531257109. The reversal of 1531257107 is 7017521351.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1531257107 - 2² = 1531257103 is a prime.

Together with 1531257109, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1531257103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765628553 + 765628554.

It is an arithmetic number, because the mean of its divisors is an integer number (765628554).

Almost surely, 2^1531257107 is an apocalyptic number.

1531257107 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531257107 is an equidigital number, since it uses as much as digits as its factorization.

1531257107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7350, while the sum is 32.

The square root of 1531257107 is about 39131.2804160559. The cubic root of 1531257107 is about 1152.6108562157.

Adding to 1531257107 its reverse (7017521351), we get a palindrome (8548778458).

The spelling of 1531257107 in words is "one billion, five hundred thirty-one million, two hundred fifty-seven thousand, one hundred seven".