71488222021 has 2 divisors, whose sum is σ = 71488222022. Its totient is φ = 71488222020.

The previous prime is 71488221997. The next prime is 71488222051. The reversal of 71488222021 is 12022288417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51704392996 + 19783829025 = 227386^2 + 140655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71488222021 is a prime.

It is a super-2 number, since 2×71488222021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71488222051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35744111010 + 35744111011.

It is an arithmetic number, because the mean of its divisors is an integer number (35744111011).

Almost surely, 2^71488222021 is an apocalyptic number.

It is an amenable number.

71488222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

71488222021 is an equidigital number, since it uses as much as digits as its factorization.

71488222021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28672, while the sum is 37.

The spelling of 71488222021 in words is "seventy-one billion, four hundred eighty-eight million, two hundred twenty-two thousand, twenty-one".