165397450 has 24 divisors (see below), whose sum is σ = 309717900. Its totient is φ = 65714960.

The previous prime is 165397447. The next prime is 165397483. The reversal of 165397450 is 54793561.

It can be written as a sum of positive squares in 6 ways, for example, as 25472209 + 139925241 = 5047^2 + 11829^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1109976 + ... + 1110124.

Almost surely, 2^165397450 is an apocalyptic number.

165397450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165397450 is a deficient number, since it is larger than the sum of its proper divisors (144320450).

165397450 is an frugal number, since it uses more digits than its factorization.

165397450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 165397450 is about 12860.6939937159. The cubic root of 165397450 is about 548.9206932974.

The spelling of 165397450 in words is "one hundred sixty-five million, three hundred ninety-seven thousand, four hundred fifty".