40219541 has 2 divisors, whose sum is σ = 40219542. Its totient is φ = 40219540.

The previous prime is 40219537. The next prime is 40219547. The reversal of 40219541 is 14591204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26306641 + 13912900 = 5129^2 + 3730^2 .

It is a cyclic number.

It is not a de Polignac number, because 40219541 - 2² = 40219537 is a prime.

It is a super-2 number, since 2×40219541² = 3235222956501362, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40219541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40219547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20109770 + 20109771.

It is an arithmetic number, because the mean of its divisors is an integer number (20109771).

Almost surely, 2^40219541 is an apocalyptic number.

It is an amenable number.

40219541 is a deficient number, since it is larger than the sum of its proper divisors (1).

40219541 is an equidigital number, since it uses as much as digits as its factorization.

40219541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 40219541 is about 6341.8878104236. The cubic root of 40219541 is about 342.6197311695.

The spelling of 40219541 in words is "forty million, two hundred nineteen thousand, five hundred forty-one".