63233281 has 2 divisors, whose sum is σ = 63233282. Its totient is φ = 63233280.

The previous prime is 63233231. The next prime is 63233321. The reversal of 63233281 is 18233236.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41990400 + 21242881 = 6480^2 + 4609^2 .

It is a cyclic number.

It is not a de Polignac number, because 63233281 - 2⁷ = 63233153 is a prime.

It is a super-2 number, since 2×63233281² = 7996895652049922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63233221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31616640 + 31616641.

It is an arithmetic number, because the mean of its divisors is an integer number (31616641).

Almost surely, 2^63233281 is an apocalyptic number.

It is an amenable number.

63233281 is a deficient number, since it is larger than the sum of its proper divisors (1).

63233281 is an equidigital number, since it uses as much as digits as its factorization.

63233281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 63233281 is about 7951.9356762992. The cubic root of 63233281 is about 398.3962472866.

It can be divided in two parts, 6323 and 3281, that added together give a square (9604 = 98²).

The spelling of 63233281 in words is "sixty-three million, two hundred thirty-three thousand, two hundred eighty-one".