221529713949 has 12 divisors (see below), whose sum is σ = 321168133312. Its totient is φ = 147141505800.

The previous prime is 221529713929. The next prime is 221529713987. The reversal of 221529713949 is 949317925122.

It is a happy number.

221529713949 is a `hidden beast` number, since 2 + 2 + 1 + 529 + 71 + 3 + 9 + 49 = 666.

221529713949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221529713949 - 2⁵ = 221529713917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221529713895 and 221529713904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221529713929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45411607 + ... + 45416484.

Almost surely, 2^221529713949 is an apocalyptic number.

It is an amenable number.

221529713949 is a deficient number, since it is larger than the sum of its proper divisors (99638419363).

221529713949 is a wasteful number, since it uses less digits than its factorization.

221529713949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90828368 (or 90828365 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The spelling of 221529713949 in words is "two hundred twenty-one billion, five hundred twenty-nine million, seven hundred thirteen thousand, nine hundred forty-nine".