252436420321 has 8 divisors (see below), whose sum is σ = 261147079080. Its totient is φ = 243726158592.

The previous prime is 252436420319. The next prime is 252436420333. The reversal of 252436420321 is 123024634252.

It can be written as a sum of positive squares in 4 ways, for example, as 41168410000 + 211268010321 = 202900^2 + 459639^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 252436420321 - 2¹ = 252436420319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252436520321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1830441 + ... + 1963513.

It is an arithmetic number, because the mean of its divisors is an integer number (32643384885).

Almost surely, 2^252436420321 is an apocalyptic number.

It is an amenable number.

252436420321 is a deficient number, since it is larger than the sum of its proper divisors (8710658759).

252436420321 is a wasteful number, since it uses less digits than its factorization.

252436420321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198515.

The product of its (nonzero) digits is 69120, while the sum is 34.

The spelling of 252436420321 in words is "two hundred fifty-two billion, four hundred thirty-six million, four hundred twenty thousand, three hundred twenty-one".