39945151 has 16 divisors (see below), whose sum is σ = 42831360. Its totient is φ = 37185120.

The previous prime is 39945119. The next prime is 39945173. The reversal of 39945151 is 15154993.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 39945151 - 2⁵ = 39945119 is a prime.

It is a Duffinian number.

Its product of digits (24300) is a multiple of the sum of its prime divisors (486).

It is a self number, because there is not a number n which added to its sum of digits gives 39945151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39945251) 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, 128286 + ... + 128596.

It is an arithmetic number, because the mean of its divisors is an integer number (2676960).

Almost surely, 2^39945151 is an apocalyptic number.

39945151 is a deficient number, since it is larger than the sum of its proper divisors (2886209).

39945151 is a wasteful number, since it uses less digits than its factorization.

39945151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486.

The product of its digits is 24300, while the sum is 37.

The square root of 39945151 is about 6320.2176386577. The cubic root of 39945151 is about 341.8388003809.

The spelling of 39945151 in words is "thirty-nine million, nine hundred forty-five thousand, one hundred fifty-one".