411020251 has 2 divisors, whose sum is σ = 411020252. Its totient is φ = 411020250.

The previous prime is 411020249. The next prime is 411020261. The reversal of 411020251 is 152020114.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 411020251 - 2¹ = 411020249 is a prime.

Together with 411020249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (411020231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205510125 + 205510126.

It is an arithmetic number, because the mean of its divisors is an integer number (205510126).

Almost surely, 2^411020251 is an apocalyptic number.

411020251 is a deficient number, since it is larger than the sum of its proper divisors (1).

411020251 is an equidigital number, since it uses as much as digits as its factorization.

411020251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 411020251 is about 20273.6343806432. The cubic root of 411020251 is about 743.5115853202.

Adding to 411020251 its reverse (152020114), we get a palindrome (563040365).

The spelling of 411020251 in words is "four hundred eleven million, twenty thousand, two hundred fifty-one".