102136631 has 4 divisors (see below), whose sum is σ = 103811064. Its totient is φ = 100462200.

The previous prime is 102136627. The next prime is 102136633. The reversal of 102136631 is 136631201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102136631 - 2² = 102136627 is a prime.

It is a super-2 number, since 2×102136631² = 20863782784060322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102136597 and 102136606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102136633) 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, 837125 + ... + 837246.

It is an arithmetic number, because the mean of its divisors is an integer number (25952766).

Almost surely, 2^102136631 is an apocalyptic number.

102136631 is a deficient number, since it is larger than the sum of its proper divisors (1674433).

102136631 is an equidigital number, since it uses as much as digits as its factorization.

102136631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674432.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 102136631 is about 10106.2669171163. The cubic root of 102136631 is about 467.4414022850.

Adding to 102136631 its reverse (136631201), we get a palindrome (238767832).

The spelling of 102136631 in words is "one hundred two million, one hundred thirty-six thousand, six hundred thirty-one".