40320751 has 2 divisors, whose sum is σ = 40320752. Its totient is φ = 40320750.

The previous prime is 40320743. The next prime is 40320767. The reversal of 40320751 is 15702304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40320751 - 2³ = 40320743 is a prime.

It is a super-2 number, since 2×40320751² = 3251525922408002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40320781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20160375 + 20160376.

It is an arithmetic number, because the mean of its divisors is an integer number (20160376).

Almost surely, 2^40320751 is an apocalyptic number.

40320751 is a deficient number, since it is larger than the sum of its proper divisors (1).

40320751 is an equidigital number, since it uses as much as digits as its factorization.

40320751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 40320751 is about 6349.8622819712. The cubic root of 40320751 is about 342.9068842597.

The spelling of 40320751 in words is "forty million, three hundred twenty thousand, seven hundred fifty-one".