252335523221 has 4 divisors (see below), whose sum is σ = 254177388492. Its totient is φ = 250493657952.

The previous prime is 252335523211. The next prime is 252335523229. The reversal of 252335523221 is 122325533252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 205512622225 + 46822900996 = 453335^2 + 216386^2 .

It is a cyclic number.

It is not a de Polignac number, because 252335523221 - 2⁶ = 252335523157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252335523229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920932430 + ... + 920932703.

It is an arithmetic number, because the mean of its divisors is an integer number (63544347123).

Almost surely, 2^252335523221 is an apocalyptic number.

It is an amenable number.

252335523221 is a deficient number, since it is larger than the sum of its proper divisors (1841865271).

252335523221 is a wasteful number, since it uses less digits than its factorization.

252335523221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841865270.

The product of its digits is 108000, while the sum is 35.

The spelling of 252335523221 in words is "two hundred fifty-two billion, three hundred thirty-five million, five hundred twenty-three thousand, two hundred twenty-one".