21862801 has 2 divisors, whose sum is σ = 21862802. Its totient is φ = 21862800.

The previous prime is 21862793. The next prime is 21862823. The reversal of 21862801 is 10826812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17766225 + 4096576 = 4215^2 + 2024^2 .

It is a cyclic number.

It is not a de Polignac number, because 21862801 - 2³ = 21862793 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21862801.

It is not a weakly prime, because it can be changed into another prime (21862861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10931400 + 10931401.

It is an arithmetic number, because the mean of its divisors is an integer number (10931401).

Almost surely, 2^21862801 is an apocalyptic number.

It is an amenable number.

21862801 is a deficient number, since it is larger than the sum of its proper divisors (1).

21862801 is an equidigital number, since it uses as much as digits as its factorization.

21862801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 21862801 is about 4675.7674236429. The cubic root of 21862801 is about 279.6202377146.

The spelling of 21862801 in words is "twenty-one million, eight hundred sixty-two thousand, eight hundred one".