199425131 has 2 divisors, whose sum is σ = 199425132. Its totient is φ = 199425130.

The previous prime is 199425119. The next prime is 199425137. The reversal of 199425131 is 131524991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199425131 is a prime.

It is a super-2 number, since 2×199425131² = 79540765748734322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 199425091 and 199425100.

It is not a weakly prime, because it can be changed into another prime (199425137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99712565 + 99712566.

It is an arithmetic number, because the mean of its divisors is an integer number (99712566).

Almost surely, 2^199425131 is an apocalyptic number.

199425131 is a deficient number, since it is larger than the sum of its proper divisors (1).

199425131 is an equidigital number, since it uses as much as digits as its factorization.

199425131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 35.

The square root of 199425131 is about 14121.7963092519. The cubic root of 199425131 is about 584.2427008921.

The spelling of 199425131 in words is "one hundred ninety-nine million, four hundred twenty-five thousand, one hundred thirty-one".