165226413 has 16 divisors (see below), whose sum is σ = 252979200. Its totient is φ = 94866480.

The previous prime is 165226409. The next prime is 165226421. The reversal of 165226413 is 314622561.

It is not a de Polignac number, because 165226413 - 2² = 165226409 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165226483) 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, 131133 + ... + 132386.

It is an arithmetic number, because the mean of its divisors is an integer number (15811200).

Almost surely, 2^165226413 is an apocalyptic number.

It is an amenable number.

165226413 is a deficient number, since it is larger than the sum of its proper divisors (87752787).

165226413 is a wasteful number, since it uses less digits than its factorization.

165226413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263552.

The product of its digits is 8640, while the sum is 30.

The square root of 165226413 is about 12854.0426714711. The cubic root of 165226413 is about 548.7314156321.

Adding to 165226413 its reverse (314622561), we get a palindrome (479848974).

The spelling of 165226413 in words is "one hundred sixty-five million, two hundred twenty-six thousand, four hundred thirteen".