198965151 has 24 divisors (see below), whose sum is σ = 358310784. Its totient is φ = 103358160.

The previous prime is 198965119. The next prime is 198965153. The reversal of 198965151 is 151569891.

It is not a de Polignac number, because 198965151 - 2⁵ = 198965119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198965097 and 198965106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198965153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142861 + ... + 144246.

It is an arithmetic number, because the mean of its divisors is an integer number (14929616).

Almost surely, 2^198965151 is an apocalyptic number.

198965151 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

198965151 is a deficient number, since it is larger than the sum of its proper divisors (159345633).

198965151 is a wasteful number, since it uses less digits than its factorization.

198965151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287131 (or 287128 counting only the distinct ones).

The product of its digits is 97200, while the sum is 45.

The square root of 198965151 is about 14105.5007355287. The cubic root of 198965151 is about 583.7931640320.

The spelling of 198965151 in words is "one hundred ninety-eight million, nine hundred sixty-five thousand, one hundred fifty-one".