40531951 has 4 divisors (see below), whose sum is σ = 40545000. Its totient is φ = 40518904.

The previous prime is 40531913. The next prime is 40531963. The reversal of 40531951 is 15913504.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40531951 - 2¹⁷ = 40400879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40531901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1125 + ... + 9073.

It is an arithmetic number, because the mean of its divisors is an integer number (10136250).

Almost surely, 2^40531951 is an apocalyptic number.

40531951 is a deficient number, since it is larger than the sum of its proper divisors (13049).

40531951 is an equidigital number, since it uses as much as digits as its factorization.

40531951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13048.

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

The square root of 40531951 is about 6366.4708434108. The cubic root of 40531951 is about 343.5045570891.

The spelling of 40531951 in words is "forty million, five hundred thirty-one thousand, nine hundred fifty-one".