191485851 has 8 divisors (see below), whose sum is σ = 255496704. Its totient is φ = 127566120.

The previous prime is 191485843. The next prime is 191485883. The reversal of 191485851 is 158584191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 191485851 - 2³ = 191485843 is a prime.

It is a super-2 number, since 2×191485851² = 73333662266388402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (191485951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17715 + ... + 26396.

It is an arithmetic number, because the mean of its divisors is an integer number (31937088).

Almost surely, 2^191485851 is an apocalyptic number.

191485851 is a deficient number, since it is larger than the sum of its proper divisors (64010853).

191485851 is a wasteful number, since it uses less digits than its factorization.

191485851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45561.

The product of its digits is 57600, while the sum is 42.

The square root of 191485851 is about 13837.8412695044. The cubic root of 191485851 is about 576.3844155770.

The spelling of 191485851 in words is "one hundred ninety-one million, four hundred eighty-five thousand, eight hundred fifty-one".