40240451 has 2 divisors, whose sum is σ = 40240452. Its totient is φ = 40240450.

The previous prime is 40240441. The next prime is 40240471. The reversal of 40240451 is 15404204.

It is an a-pointer prime, because the next prime (40240471) can be obtained adding 40240451 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40240451 - 2¹⁰ = 40239427 is a prime.

It is not a weakly prime, because it can be changed into another prime (40240441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20120225 + 20120226.

It is an arithmetic number, because the mean of its divisors is an integer number (20120226).

Almost surely, 2^40240451 is an apocalyptic number.

40240451 is a deficient number, since it is larger than the sum of its proper divisors (1).

40240451 is an equidigital number, since it uses as much as digits as its factorization.

40240451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 40240451 is about 6343.5361589574. The cubic root of 40240451 is about 342.6790964864.

Adding to 40240451 its reverse (15404204), we get a palindrome (55644655).

The spelling of 40240451 in words is "forty million, two hundred forty thousand, four hundred fifty-one".