215211332252 has 24 divisors (see below), whose sum is σ = 439580596224. Its totient is φ = 90271014192.

The previous prime is 215211332251. The next prime is 215211332263. The reversal of 215211332252 is 252233112512.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215211332251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81765908 + ... + 81768539.

It is an arithmetic number, because the mean of its divisors is an integer number (18315858176).

Almost surely, 2^215211332252 is an apocalyptic number.

It is an amenable number.

215211332252 is an abundant number, since it is smaller than the sum of its proper divisors (224369263972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215211332252 is a wasteful number, since it uses less digits than its factorization.

215211332252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163534505 (or 163534503 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

Adding to 215211332252 its reverse (252233112512), we get a palindrome (467444444764).

The spelling of 215211332252 in words is "two hundred fifteen billion, two hundred eleven million, three hundred thirty-two thousand, two hundred fifty-two".