40513951 has 2 divisors, whose sum is σ = 40513952. Its totient is φ = 40513950.

The previous prime is 40513939. The next prime is 40513969. The reversal of 40513951 is 15931504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40513951 - 2⁵ = 40513919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40513751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20256975 + 20256976.

It is an arithmetic number, because the mean of its divisors is an integer number (20256976).

Almost surely, 2^40513951 is an apocalyptic number.

40513951 is a deficient number, since it is larger than the sum of its proper divisors (1).

40513951 is an equidigital number, since it uses as much as digits as its factorization.

40513951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 40513951 is about 6365.0570303808. The cubic root of 40513951 is about 343.4537001118.

The spelling of 40513951 in words is "forty million, five hundred thirteen thousand, nine hundred fifty-one".