190681331 has 4 divisors (see below), whose sum is σ = 190892472. Its totient is φ = 190470192.

The previous prime is 190681301. The next prime is 190681391. The reversal of 190681331 is 133186091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133186091 = 73 ⋅1824467.

It is a cyclic number.

It is not a de Polignac number, because 190681331 - 2²² = 186487027 is a prime.

It is a super-2 number, since 2×190681331² = 72718739983863122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190681301) 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, 104210 + ... + 106023.

It is an arithmetic number, because the mean of its divisors is an integer number (47723118).

Almost surely, 2^190681331 is an apocalyptic number.

190681331 is a deficient number, since it is larger than the sum of its proper divisors (211141).

190681331 is an equidigital number, since it uses as much as digits as its factorization.

190681331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211140.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 190681331 is about 13808.7411084429. The cubic root of 190681331 is about 575.5760638874.

The spelling of 190681331 in words is "one hundred ninety million, six hundred eighty-one thousand, three hundred thirty-one".