196021531 has 2 divisors, whose sum is σ = 196021532. Its totient is φ = 196021530.

The previous prime is 196021519. The next prime is 196021547. The reversal of 196021531 is 135120691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 196021531 - 2⁷ = 196021403 is a prime.

It is a super-2 number, since 2×196021531² = 76848881231167922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 196021531.

It is not a weakly prime, because it can be changed into another prime (196021031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98010765 + 98010766.

It is an arithmetic number, because the mean of its divisors is an integer number (98010766).

Almost surely, 2^196021531 is an apocalyptic number.

196021531 is a deficient number, since it is larger than the sum of its proper divisors (1).

196021531 is an equidigital number, since it uses as much as digits as its factorization.

196021531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 196021531 is about 14000.7689431688. The cubic root of 196021531 is about 580.8998428098.

The spelling of 196021531 in words is "one hundred ninety-six million, twenty-one thousand, five hundred thirty-one".