40961831 has 2 divisors, whose sum is σ = 40961832. Its totient is φ = 40961830.

The previous prime is 40961813. The next prime is 40961861. The reversal of 40961831 is 13816904.

It is a happy number.

Together with previous prime (40961813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40961831 - 2¹⁰ = 40960807 is a prime.

It is a super-2 number, since 2×40961831² = 3355743197745122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40961801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20480915 + 20480916.

It is an arithmetic number, because the mean of its divisors is an integer number (20480916).

Almost surely, 2^40961831 is an apocalyptic number.

40961831 is a deficient number, since it is larger than the sum of its proper divisors (1).

40961831 is an equidigital number, since it uses as much as digits as its factorization.

40961831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 40961831 is about 6400.1430452764. The cubic root of 40961831 is about 344.7146867477.

The spelling of 40961831 in words is "forty million, nine hundred sixty-one thousand, eight hundred thirty-one".