191551072 has 24 divisors (see below), whose sum is σ = 387310896. Its totient is φ = 93186432.

The previous prime is 191551067. The next prime is 191551117. The reversal of 191551072 is 270155191.

191551072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79708 + ... + 82075.

It is an arithmetic number, because the mean of its divisors is an integer number (16137954).

Almost surely, 2^191551072 is an apocalyptic number.

It is an amenable number.

191551072 is an abundant number, since it is smaller than the sum of its proper divisors (195759824).

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

191551072 is a wasteful number, since it uses less digits than its factorization.

191551072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161830 (or 161822 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 31.

The square root of 191551072 is about 13840.1976864494. The cubic root of 191551072 is about 576.4498479149.

The spelling of 191551072 in words is "one hundred ninety-one million, five hundred fifty-one thousand, seventy-two".