165425390 has 32 divisors (see below), whose sum is σ = 321541920. Its totient is φ = 60914304.

The previous prime is 165425387. The next prime is 165425401. The reversal of 165425390 is 93524561.

It is a self number, because there is not a number n which added to its sum of digits gives 165425390.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52952 + ... + 55988.

It is an arithmetic number, because the mean of its divisors is an integer number (10048185).

Almost surely, 2^165425390 is an apocalyptic number.

165425390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165425390 is a deficient number, since it is larger than the sum of its proper divisors (156116530).

165425390 is a wasteful number, since it uses less digits than its factorization.

165425390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3476.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 165425390 is about 12861.7802033778. The cubic root of 165425390 is about 548.9516006273.

The spelling of 165425390 in words is "one hundred sixty-five million, four hundred twenty-five thousand, three hundred ninety".