40651651 has 4 divisors (see below), whose sum is σ = 40707400. Its totient is φ = 40595904.

The previous prime is 40651643. The next prime is 40651661. The reversal of 40651651 is 15615604.

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

It is a cyclic number.

It is not a de Polignac number, because 40651651 - 2³ = 40651643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40651631) 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, 26766 + ... + 28243.

It is an arithmetic number, because the mean of its divisors is an integer number (10176850).

Almost surely, 2^40651651 is an apocalyptic number.

40651651 is a deficient number, since it is larger than the sum of its proper divisors (55749).

40651651 is an equidigital number, since it uses as much as digits as its factorization.

40651651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55748.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 40651651 is about 6375.8647256666. The cubic root of 40651651 is about 343.8423735881.

The spelling of 40651651 in words is "forty million, six hundred fifty-one thousand, six hundred fifty-one".