21610411 has 2 divisors, whose sum is σ = 21610412. Its totient is φ = 21610410.

The previous prime is 21610399. The next prime is 21610427. The reversal of 21610411 is 11401612.

It is an a-pointer prime, because the next prime (21610427) can be obtained adding 21610411 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21610411 - 2⁷ = 21610283 is a prime.

It is not a weakly prime, because it can be changed into another prime (21611411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10805205 + 10805206.

It is an arithmetic number, because the mean of its divisors is an integer number (10805206).

Almost surely, 2^21610411 is an apocalyptic number.

21610411 is a deficient number, since it is larger than the sum of its proper divisors (1).

21610411 is an equidigital number, since it uses as much as digits as its factorization.

21610411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 21610411 is about 4648.6999257857. The cubic root of 21610411 is about 278.5400668868.

The spelling of 21610411 in words is "twenty-one million, six hundred ten thousand, four hundred eleven".