51722563 has 2 divisors, whose sum is σ = 51722564. Its totient is φ = 51722562.

The previous prime is 51722557. The next prime is 51722581. The reversal of 51722563 is 36522715.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51722563 is a prime.

It is not a weakly prime, because it can be changed into another prime (51722533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25861281 + 25861282.

It is an arithmetic number, because the mean of its divisors is an integer number (25861282).

Almost surely, 2^51722563 is an apocalyptic number.

51722563 is a deficient number, since it is larger than the sum of its proper divisors (1).

51722563 is an equidigital number, since it uses as much as digits as its factorization.

51722563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 31.

The square root of 51722563 is about 7191.8400288104. The cubic root of 51722563 is about 372.5861260546.

The spelling of 51722563 in words is "fifty-one million, seven hundred twenty-two thousand, five hundred sixty-three".