63428551 has 2 divisors, whose sum is σ = 63428552. Its totient is φ = 63428550.

The previous prime is 63428543. The next prime is 63428557. The reversal of 63428551 is 15582436.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63428551 - 2³ = 63428543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63428557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31714275 + 31714276.

It is an arithmetic number, because the mean of its divisors is an integer number (31714276).

Almost surely, 2^63428551 is an apocalyptic number.

63428551 is a deficient number, since it is larger than the sum of its proper divisors (1).

63428551 is an equidigital number, since it uses as much as digits as its factorization.

63428551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 34.

The square root of 63428551 is about 7964.2043544851. The cubic root of 63428551 is about 398.8059202307.

The spelling of 63428551 in words is "sixty-three million, four hundred twenty-eight thousand, five hundred fifty-one".