40651307 has 4 divisors (see below), whose sum is σ = 40894896. Its totient is φ = 40407720.

The previous prime is 40651283. The next prime is 40651309. The reversal of 40651307 is 70315604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40651307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40651309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121544 + ... + 121877.

It is an arithmetic number, because the mean of its divisors is an integer number (10223724).

Almost surely, 2^40651307 is an apocalyptic number.

40651307 is a deficient number, since it is larger than the sum of its proper divisors (243589).

40651307 is a wasteful number, since it uses less digits than its factorization.

40651307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243588.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 40651307 is about 6375.8377488766. The cubic root of 40651307 is about 343.8414037045.

The spelling of 40651307 in words is "forty million, six hundred fifty-one thousand, three hundred seven".