63121451 has 2 divisors, whose sum is σ = 63121452. Its totient is φ = 63121450.

The previous prime is 63121351. The next prime is 63121469. The reversal of 63121451 is 15412136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63121451 - 2¹⁰ = 63120427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63121351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31560725 + 31560726.

It is an arithmetic number, because the mean of its divisors is an integer number (31560726).

Almost surely, 2^63121451 is an apocalyptic number.

63121451 is a deficient number, since it is larger than the sum of its proper divisors (1).

63121451 is an equidigital number, since it uses as much as digits as its factorization.

63121451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 23.

The square root of 63121451 is about 7944.9009433724. The cubic root of 63121451 is about 398.1612500314.

Adding to 63121451 its reverse (15412136), we get a palindrome (78533587).

The spelling of 63121451 in words is "sixty-three million, one hundred twenty-one thousand, four hundred fifty-one".