40145951 has 2 divisors, whose sum is σ = 40145952. Its totient is φ = 40145950.

The previous prime is 40145933. The next prime is 40145953. The reversal of 40145951 is 15954104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40145951 - 2¹⁰ = 40144927 is a prime.

It is a super-2 number, since 2×40145951² = 3223394763388802, which contains 22 as substring.

Together with 40145953, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40145953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20072975 + 20072976.

It is an arithmetic number, because the mean of its divisors is an integer number (20072976).

Almost surely, 2^40145951 is an apocalyptic number.

40145951 is a deficient number, since it is larger than the sum of its proper divisors (1).

40145951 is an equidigital number, since it uses as much as digits as its factorization.

40145951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 40145951 is about 6336.0832538722. The cubic root of 40145951 is about 342.4106389492.

The spelling of 40145951 in words is "forty million, one hundred forty-five thousand, nine hundred fifty-one".