40143451 has 2 divisors, whose sum is σ = 40143452. Its totient is φ = 40143450.

The previous prime is 40143437. The next prime is 40143457. The reversal of 40143451 is 15434104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40143451 - 2⁹ = 40142939 is a prime.

It is a super-2 number, since 2×40143451² = 3222993316378802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40143457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20071725 + 20071726.

It is an arithmetic number, because the mean of its divisors is an integer number (20071726).

Almost surely, 2^40143451 is an apocalyptic number.

40143451 is a deficient number, since it is larger than the sum of its proper divisors (1).

40143451 is an equidigital number, since it uses as much as digits as its factorization.

40143451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 40143451 is about 6335.8859680395. The cubic root of 40143451 is about 342.4035311808.

Adding to 40143451 its reverse (15434104), we get a palindrome (55577555).

The spelling of 40143451 in words is "forty million, one hundred forty-three thousand, four hundred fifty-one".