40531217 has 2 divisors, whose sum is σ = 40531218. Its totient is φ = 40531216.

The previous prime is 40531207. The next prime is 40531259. The reversal of 40531217 is 71213504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34621456 + 5909761 = 5884^2 + 2431^2 .

It is a cyclic number.

It is not a de Polignac number, because 40531217 - 2¹² = 40527121 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40531192 and 40531201.

It is not a weakly prime, because it can be changed into another prime (40531207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20265608 + 20265609.

It is an arithmetic number, because the mean of its divisors is an integer number (20265609).

Almost surely, 2^40531217 is an apocalyptic number.

It is an amenable number.

40531217 is a deficient number, since it is larger than the sum of its proper divisors (1).

40531217 is an equidigital number, since it uses as much as digits as its factorization.

40531217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 40531217 is about 6366.4131973977. The cubic root of 40531217 is about 343.5024835491.

The spelling of 40531217 in words is "forty million, five hundred thirty-one thousand, two hundred seventeen".