102102731 has 8 divisors (see below), whose sum is σ = 108197280. Its totient is φ = 96018048.

The previous prime is 102102709. The next prime is 102102733. The reversal of 102102731 is 137201201.

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

It is a cyclic number.

It is not a de Polignac number, because 102102731 - 2⁶ = 102102667 is a prime.

It is a super-2 number, since 2×102102731² = 20849935355316722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102102733) 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, 37250 + ... + 39896.

It is an arithmetic number, because the mean of its divisors is an integer number (13524660).

Almost surely, 2^102102731 is an apocalyptic number.

102102731 is a deficient number, since it is larger than the sum of its proper divisors (6094549).

102102731 is a wasteful number, since it uses less digits than its factorization.

102102731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4933.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 102102731 is about 10104.5896007705. The cubic root of 102102731 is about 467.3896806618.

Adding to 102102731 its reverse (137201201), we get a palindrome (239303932).

The spelling of 102102731 in words is "one hundred two million, one hundred two thousand, seven hundred thirty-one".