102631 has 4 divisors (see below), whose sum is σ = 106200. Its totient is φ = 99064.

The previous prime is 102611. The next prime is 102643. The reversal of 102631 is 136201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136201 = 13 ⋅10477.

It is not a de Polignac number, because 102631 - 2⁷ = 102503 is a prime.

It is a super-2 number, since 2×102631² = 21066244322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1741 + ... + 1798.

It is an arithmetic number, because the mean of its divisors is an integer number (26550).

2¹⁰²⁶³¹ is an apocalyptic number.

102631 is a deficient number, since it is larger than the sum of its proper divisors (3569).

102631 is an equidigital number, since it uses as much as digits as its factorization.

102631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3568.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 102631 is about 320.3607341732. The cubic root of 102631 is about 46.8194369795.

Adding to 102631 its reverse (136201), we get a palindrome (238832).

The spelling of 102631 in words is "one hundred two thousand, six hundred thirty-one".