221700458929 has 2 divisors, whose sum is σ = 221700458930. Its totient is φ = 221700458928.

The previous prime is 221700458897. The next prime is 221700458957. The reversal of 221700458929 is 929854007122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218020823329 + 3679635600 = 466927^2 + 60660^2 .

It is a cyclic number.

It is not a de Polignac number, because 221700458929 - 2⁵ = 221700458897 is a prime.

It is a super-3 number, since 3×221700458929³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (221700458999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110850229464 + 110850229465.

It is an arithmetic number, because the mean of its divisors is an integer number (110850229465).

Almost surely, 2^221700458929 is an apocalyptic number.

It is an amenable number.

221700458929 is a deficient number, since it is larger than the sum of its proper divisors (1).

221700458929 is an equidigital number, since it uses as much as digits as its factorization.

221700458929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 221700458929 in words is "two hundred twenty-one billion, seven hundred million, four hundred fifty-eight thousand, nine hundred twenty-nine".