40147631 has 2 divisors, whose sum is σ = 40147632. Its totient is φ = 40147630.

The previous prime is 40147607. The next prime is 40147637. The reversal of 40147631 is 13674104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40147631 - 2⁶ = 40147567 is a prime.

It is a super-2 number, since 2×40147631² = 3223664549824322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40147631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40147637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20073815 + 20073816.

It is an arithmetic number, because the mean of its divisors is an integer number (20073816).

Almost surely, 2^40147631 is an apocalyptic number.

40147631 is a deficient number, since it is larger than the sum of its proper divisors (1).

40147631 is an equidigital number, since it uses as much as digits as its factorization.

40147631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 40147631 is about 6336.2158265009. The cubic root of 40147631 is about 342.4154152038.

The spelling of 40147631 in words is "forty million, one hundred forty-seven thousand, six hundred thirty-one".