165297651 has 16 divisors (see below), whose sum is σ = 228588960. Its totient is φ = 106122240.

The previous prime is 165297599. The next prime is 165297659. The reversal of 165297651 is 156792561.

It is not a de Polignac number, because 165297651 - 2¹⁴ = 165281267 is a prime.

It is a super-2 number, since 2×165297651² = 54646626852235602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165297659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34371 + ... + 38883.

It is an arithmetic number, because the mean of its divisors is an integer number (14286810).

Almost surely, 2^165297651 is an apocalyptic number.

165297651 is a deficient number, since it is larger than the sum of its proper divisors (63291309).

165297651 is a wasteful number, since it uses less digits than its factorization.

165297651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4966.

The product of its digits is 113400, while the sum is 42.

The square root of 165297651 is about 12856.8134076839. The cubic root of 165297651 is about 548.8102668505.

The spelling of 165297651 in words is "one hundred sixty-five million, two hundred ninety-seven thousand, six hundred fifty-one".