190981531 has 8 divisors (see below), whose sum is σ = 211231664. Its totient is φ = 171525600.

The previous prime is 190981529. The next prime is 190981537. The reversal of 190981531 is 135189091.

It is a happy number.

190981531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 190981531 - 2¹ = 190981529 is a prime.

It is a super-2 number, since 2×190981531² = 72947890366207922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190981537) 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, 198045 + ... + 199006.

It is an arithmetic number, because the mean of its divisors is an integer number (26403958).

Almost surely, 2^190981531 is an apocalyptic number.

190981531 is a deficient number, since it is larger than the sum of its proper divisors (20250133).

190981531 is a wasteful number, since it uses less digits than its factorization.

190981531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397101.

The product of its (nonzero) digits is 9720, while the sum is 37.

The square root of 190981531 is about 13819.6067599625. The cubic root of 190981531 is about 575.8779590899.

The spelling of 190981531 in words is "one hundred ninety million, nine hundred eighty-one thousand, five hundred thirty-one".