40531619 has 2 divisors, whose sum is σ = 40531620. Its totient is φ = 40531618.

The previous prime is 40531609. The next prime is 40531691. The reversal of 40531619 is 91613504.

Together with next prime (40531691) 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 40531619 - 2⁸ = 40531363 is a prime.

It is a super-2 number, since 2×40531619² = 3285624277522322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 40531591 and 40531600.

It is not a weakly prime, because it can be changed into another prime (40531609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20265809 + 20265810.

It is an arithmetic number, because the mean of its divisors is an integer number (20265810).

Almost surely, 2^40531619 is an apocalyptic number.

40531619 is a deficient number, since it is larger than the sum of its proper divisors (1).

40531619 is an equidigital number, since it uses as much as digits as its factorization.

40531619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 40531619 is about 6366.4447692570. Note that the first 3 decimals coincide. The cubic root of 40531619 is about 343.5036191967.

The spelling of 40531619 in words is "forty million, five hundred thirty-one thousand, six hundred nineteen".