63211901 has 2 divisors, whose sum is σ = 63211902. Its totient is φ = 63211900.

The previous prime is 63211817. The next prime is 63211903. The reversal of 63211901 is 10911236.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47251876 + 15960025 = 6874^2 + 3995^2 .

It is a cyclic number.

It is not a de Polignac number, because 63211901 - 2²² = 59017597 is a prime.

Together with 63211903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63211903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31605950 + 31605951.

It is an arithmetic number, because the mean of its divisors is an integer number (31605951).

Almost surely, 2^63211901 is an apocalyptic number.

It is an amenable number.

63211901 is a deficient number, since it is larger than the sum of its proper divisors (1).

63211901 is an equidigital number, since it uses as much as digits as its factorization.

63211901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 63211901 is about 7950.5912358767. The cubic root of 63211901 is about 398.3513412298.

The spelling of 63211901 in words is "sixty-three million, two hundred eleven thousand, nine hundred one".