862221541 has 2 divisors, whose sum is σ = 862221542. Its totient is φ = 862221540.

The previous prime is 862221511. The next prime is 862221553. The reversal of 862221541 is 145122268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 844193025 + 18028516 = 29055^2 + 4246^2 .

It is a cyclic number.

It is not a de Polignac number, because 862221541 - 2⁹ = 862221029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (862221511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431110770 + 431110771.

It is an arithmetic number, because the mean of its divisors is an integer number (431110771).

Almost surely, 2^862221541 is an apocalyptic number.

It is an amenable number.

862221541 is a deficient number, since it is larger than the sum of its proper divisors (1).

862221541 is an equidigital number, since it uses as much as digits as its factorization.

862221541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 31.

The square root of 862221541 is about 29363.6091276260. The cubic root of 862221541 is about 951.7866804982.

The spelling of 862221541 in words is "eight hundred sixty-two million, two hundred twenty-one thousand, five hundred forty-one".