191425190 has 32 divisors (see below), whose sum is σ = 395677440. Its totient is φ = 65944800.

The previous prime is 191425189. The next prime is 191425243. The reversal of 191425190 is 91524191.

It is a super-2 number, since 2×191425190² = 73287206733072200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43706 + ... + 47885.

It is an arithmetic number, because the mean of its divisors is an integer number (12364920).

Almost surely, 2^191425190 is an apocalyptic number.

191425190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191425190 is an abundant number, since it is smaller than the sum of its proper divisors (204252250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191425190 is a wasteful number, since it uses less digits than its factorization.

191425190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91628.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 191425190 is about 13835.6492438917. The cubic root of 191425190 is about 576.3235446778.

Subtracting from 191425190 its reverse (91524191), we obtain a palindrome (99900999).

The spelling of 191425190 in words is "one hundred ninety-one million, four hundred twenty-five thousand, one hundred ninety".