195023931 has 4 divisors (see below), whose sum is σ = 260031912. Its totient is φ = 130015952.

The previous prime is 195023909. The next prime is 195023947. The reversal of 195023931 is 139320591.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195023931 is a prime.

It is a super-2 number, since 2×195023931² = 76068667325385522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 195023892 and 195023901.

It is not an unprimeable number, because it can be changed into a prime (195023951) 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, 32503986 + ... + 32503991.

It is an arithmetic number, because the mean of its divisors is an integer number (65007978).

Almost surely, 2^195023931 is an apocalyptic number.

195023931 is a deficient number, since it is larger than the sum of its proper divisors (65007981).

195023931 is an equidigital number, since it uses as much as digits as its factorization.

195023931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65007980.

The product of its (nonzero) digits is 7290, while the sum is 33.

The square root of 195023931 is about 13965.0968847337. The cubic root of 195023931 is about 579.9127207153.

The spelling of 195023931 in words is "one hundred ninety-five million, twenty-three thousand, nine hundred thirty-one".