196155551 has 8 divisors (see below), whose sum is σ = 201041280. Its totient is φ = 191284632.

The previous prime is 196155511. The next prime is 196155559. The reversal of 196155551 is 155551691.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196155551 is a prime.

It is a super-2 number, since 2×196155551² = 76954000376227202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196155559) 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, 26030 + ... + 32708.

It is an arithmetic number, because the mean of its divisors is an integer number (25130160).

Almost surely, 2^196155551 is an apocalyptic number.

196155551 is a deficient number, since it is larger than the sum of its proper divisors (4885729).

196155551 is an equidigital number, since it uses as much as digits as its factorization.

196155551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7405.

The product of its digits is 33750, while the sum is 38.

The square root of 196155551 is about 14005.5542910661. The cubic root of 196155551 is about 581.0321998027.

The spelling of 196155551 in words is "one hundred ninety-six million, one hundred fifty-five thousand, five hundred fifty-one".