102145031 has 8 divisors (see below), whose sum is σ = 106886784. Its totient is φ = 97493760.

The previous prime is 102145009. The next prime is 102145079. The reversal of 102145031 is 130541201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-102145031 is a prime.

It is a super-2 number, since 2×102145031² = 20867214715981922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102145331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20306 + ... + 24831.

It is an arithmetic number, because the mean of its divisors is an integer number (13360848).

Almost surely, 2^102145031 is an apocalyptic number.

102145031 is a deficient number, since it is larger than the sum of its proper divisors (4741753).

102145031 is an equidigital number, since it uses as much as digits as its factorization.

102145031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45241.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 102145031 is about 10106.6824922919. The cubic root of 102145031 is about 467.4542164931.

Adding to 102145031 its reverse (130541201), we get a palindrome (232686232).

The spelling of 102145031 in words is "one hundred two million, one hundred forty-five thousand, thirty-one".