196721570 has 16 divisors (see below), whose sum is σ = 354277368. Its totient is φ = 78648960.

The previous prime is 196721549. The next prime is 196721593. The reversal of 196721570 is 75127691.

It can be written as a sum of positive squares in 4 ways, for example, as 178837129 + 17884441 = 13373^2 + 4229^2 .

It is a super-2 number, since 2×196721570² = 77398752206529800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23822 + ... + 30998.

Almost surely, 2^196721570 is an apocalyptic number.

196721570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

196721570 is a deficient number, since it is larger than the sum of its proper divisors (157555798).

196721570 is a wasteful number, since it uses less digits than its factorization.

196721570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9925.

The product of its (nonzero) digits is 26460, while the sum is 38.

The square root of 196721570 is about 14025.7466824408. The cubic root of 196721570 is about 581.5905312547.

The spelling of 196721570 in words is "one hundred ninety-six million, seven hundred twenty-one thousand, five hundred seventy".