9902160231 has 4 divisors (see below), whose sum is σ = 13202880312. Its totient is φ = 6601440152.

The previous prime is 9902160217. The next prime is 9902160239. The reversal of 9902160231 is 1320612099.

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 9902160231 - 2⁶ = 9902160167 is a prime.

It is a super-2 number, since 2×9902160231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9902160192 and 9902160201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9902160239) 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, 1650360036 + ... + 1650360041.

It is an arithmetic number, because the mean of its divisors is an integer number (3300720078).

Almost surely, 2^9902160231 is an apocalyptic number.

9902160231 is a deficient number, since it is larger than the sum of its proper divisors (3300720081).

9902160231 is a wasteful number, since it uses less digits than its factorization.

9902160231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300720080.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 9902160231 is about 99509.5986877648. The cubic root of 9902160231 is about 2147.3853364827.

The spelling of 9902160231 in words is "nine billion, nine hundred two million, one hundred sixty thousand, two hundred thirty-one".