221520151233 has 12 divisors (see below), whose sum is σ = 320161904400. Its totient is φ = 147593168856.

The previous prime is 221520151231. The next prime is 221520151253. The reversal of 221520151233 is 332151025122.

221520151233 is a `hidden beast` number, since 2 + 2 + 1 + 520 + 15 + 123 + 3 = 666.

It is not a de Polignac number, because 221520151233 - 2¹ = 221520151231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221520151197 and 221520151206.

It is not an unprimeable number, because it can be changed into a prime (221520151231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7228191 + ... + 7258772.

It is an arithmetic number, because the mean of its divisors is an integer number (26680158700).

Almost surely, 2^221520151233 is an apocalyptic number.

It is an amenable number.

221520151233 is a deficient number, since it is larger than the sum of its proper divisors (98641753167).

221520151233 is a wasteful number, since it uses less digits than its factorization.

221520151233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14488668 (or 14488665 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 221520151233 its reverse (332151025122), we get a palindrome (553671176355).

The spelling of 221520151233 in words is "two hundred twenty-one billion, five hundred twenty million, one hundred fifty-one thousand, two hundred thirty-three".