192015981 has 8 divisors (see below), whose sum is σ = 284468160. Its totient is φ = 128010636.

The previous prime is 192015973. The next prime is 192015991. The reversal of 192015981 is 189510291.

It is not a de Polignac number, because 192015981 - 2³ = 192015973 is a prime.

It is a super-2 number, since 2×192015981² = 73740273918784722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (192015911) 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, 3555825 + ... + 3555878.

It is an arithmetic number, because the mean of its divisors is an integer number (35558520).

Almost surely, 2^192015981 is an apocalyptic number.

It is an amenable number.

192015981 is a deficient number, since it is larger than the sum of its proper divisors (92452179).

192015981 is an equidigital number, since it uses as much as digits as its factorization.

192015981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7111712 (or 7111706 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 36.

The square root of 192015981 is about 13856.9831132177. The cubic root of 192015981 is about 576.9158336444.

The spelling of 192015981 in words is "one hundred ninety-two million, fifteen thousand, nine hundred eighty-one".