40581403 has 2 divisors, whose sum is σ = 40581404. Its totient is φ = 40581402.

The previous prime is 40581337. The next prime is 40581427. The reversal of 40581403 is 30418504.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40581403 is a prime.

It is not a weakly prime, because it can be changed into another prime (40581433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20290701 + 20290702.

It is an arithmetic number, because the mean of its divisors is an integer number (20290702).

Almost surely, 2^40581403 is an apocalyptic number.

40581403 is a deficient number, since it is larger than the sum of its proper divisors (1).

40581403 is an equidigital number, since it uses as much as digits as its factorization.

40581403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 40581403 is about 6370.3534438836. The cubic root of 40581403 is about 343.6442006967.

Adding to 40581403 its reverse (30418504), we get a palindrome (70999907).

The spelling of 40581403 in words is "forty million, five hundred eighty-one thousand, four hundred three".