190821512 has 16 divisors (see below), whose sum is σ = 408903360. Its totient is φ = 81780624.

The previous prime is 190821509. The next prime is 190821539. The reversal of 190821512 is 215128091.

190821512 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×190821512² = 72825698883932288, which contains 22 as substring.

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, 1703708 + ... + 1703819.

It is an arithmetic number, because the mean of its divisors is an integer number (25556460).

Almost surely, 2^190821512 is an apocalyptic number.

It is an amenable number.

190821512 is an abundant number, since it is smaller than the sum of its proper divisors (218081848).

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

190821512 is a wasteful number, since it uses less digits than its factorization.

190821512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3407540 (or 3407536 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 190821512 is about 13813.8159825589. The cubic root of 190821512 is about 575.7170758816.

The spelling of 190821512 in words is "one hundred ninety million, eight hundred twenty-one thousand, five hundred twelve".