165798831 has 8 divisors (see below), whose sum is σ = 241161984. Its totient is φ = 100484120.

The previous prime is 165798823. The next prime is 165798833. The reversal of 165798831 is 138897561.

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

It is not a de Polignac number, because 165798831 - 2³ = 165798823 is a prime.

It is a super-2 number, since 2×165798831² = 54978504721933122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165798833) by changing a digit.

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, 2512071 + ... + 2512136.

It is an arithmetic number, because the mean of its divisors is an integer number (30145248).

Almost surely, 2^165798831 is an apocalyptic number.

165798831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

165798831 is a deficient number, since it is larger than the sum of its proper divisors (75363153).

165798831 is a wasteful number, since it uses less digits than its factorization.

165798831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5024221.

The product of its digits is 362880, while the sum is 48.

The square root of 165798831 is about 12876.2894888240. The cubic root of 165798831 is about 549.3643687185.

The spelling of 165798831 in words is "one hundred sixty-five million, seven hundred ninety-eight thousand, eight hundred thirty-one".