165400245 has 32 divisors (see below), whose sum is σ = 306835200. Its totient is φ = 84376512.

The previous prime is 165400217. The next prime is 165400267. The reversal of 165400245 is 542004561.

165400245 is a `hidden beast` number, since 1 + 654 + 0 + 0 + 2 + 4 + 5 = 666.

It is not a de Polignac number, because 165400245 - 2⁸ = 165399989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23530 + ... + 29739.

It is an arithmetic number, because the mean of its divisors is an integer number (9588600).

Almost surely, 2^165400245 is an apocalyptic number.

165400245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165400245 is a deficient number, since it is larger than the sum of its proper divisors (141434955).

165400245 is a wasteful number, since it uses less digits than its factorization.

165400245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53306 (or 53300 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 165400245 is about 12860.8026576882. The cubic root of 165400245 is about 548.9237852933.

The spelling of 165400245 in words is "one hundred sixty-five million, four hundred thousand, two hundred forty-five".