202130991 has 32 divisors (see below), whose sum is σ = 306432000. Its totient is φ = 131644224.

The previous prime is 202130983. The next prime is 202130993. The reversal of 202130991 is 199031202.

It is not a de Polignac number, because 202130991 - 2³ = 202130983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202130993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 354955 + ... + 355523.

It is an arithmetic number, because the mean of its divisors is an integer number (9576000).

Almost surely, 2^202130991 is an apocalyptic number.

202130991 is a deficient number, since it is larger than the sum of its proper divisors (104301009).

202130991 is a wasteful number, since it uses less digits than its factorization.

202130991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860 (or 854 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 202130991 is about 14217.2779040152. The cubic root of 202130991 is about 586.8732326499.

The spelling of 202130991 in words is "two hundred two million, one hundred thirty thousand, nine hundred ninety-one".