102531491 has 2 divisors, whose sum is σ = 102531492. Its totient is φ = 102531490.

The previous prime is 102531469. The next prime is 102531497. The reversal of 102531491 is 194135201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102531491 - 2⁶ = 102531427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102531491.

It is not a weakly prime, because it can be changed into another prime (102531497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51265745 + 51265746.

It is an arithmetic number, because the mean of its divisors is an integer number (51265746).

Almost surely, 2^102531491 is an apocalyptic number.

102531491 is a deficient number, since it is larger than the sum of its proper divisors (1).

102531491 is an equidigital number, since it uses as much as digits as its factorization.

102531491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 102531491 is about 10125.7834758600. The cubic root of 102531491 is about 468.0430035118.

Adding to 102531491 its reverse (194135201), we get a palindrome (296666692).

The spelling of 102531491 in words is "one hundred two million, five hundred thirty-one thousand, four hundred ninety-one".