102499031 has 4 divisors (see below), whose sum is σ = 102545952. Its totient is φ = 102452112.

The previous prime is 102498997. The next prime is 102499043. The reversal of 102499031 is 130994201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130994201 = 13 ⋅10076477.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102499031 is a prime.

It is a super-2 number, since 2×102499031² = 21012102711877922, 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 = 102498985 and 102499003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102499531) 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, 20015 + ... + 24608.

It is an arithmetic number, because the mean of its divisors is an integer number (25636488).

Almost surely, 2^102499031 is an apocalyptic number.

102499031 is a deficient number, since it is larger than the sum of its proper divisors (46921).

102499031 is an equidigital number, since it uses as much as digits as its factorization.

102499031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46920.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 102499031 is about 10124.1805100462. The cubic root of 102499031 is about 467.9936063972.

The spelling of 102499031 in words is "one hundred two million, four hundred ninety-nine thousand, thirty-one".