102161831 has 4 divisors (see below), whose sum is σ = 103066032. Its totient is φ = 101257632.

The previous prime is 102161827. The next prime is 102161861. The reversal of 102161831 is 138161201.

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 102161831 - 2² = 102161827 is a prime.

It is a super-2 number, since 2×102161831² = 20874079426545122, 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 = 102161797 and 102161806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102161861) 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, 451931 + ... + 452156.

It is an arithmetic number, because the mean of its divisors is an integer number (25766508).

Almost surely, 2^102161831 is an apocalyptic number.

102161831 is a deficient number, since it is larger than the sum of its proper divisors (904201).

102161831 is an equidigital number, since it uses as much as digits as its factorization.

102161831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904200.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 102161831 is about 10107.5135913834. The cubic root of 102161831 is about 467.4798428020.

The spelling of 102161831 in words is "one hundred two million, one hundred sixty-one thousand, eight hundred thirty-one".