215213333020 has 24 divisors (see below), whose sum is σ = 516511999584. Its totient is φ = 73787428416.

The previous prime is 215213332973. The next prime is 215213333021. The reversal of 215213333020 is 20333312512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215213333021) 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, 768618907 + ... + 768619186.

It is an arithmetic number, because the mean of its divisors is an integer number (21521333316).

Almost surely, 2^215213333020 is an apocalyptic number.

215213333020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215213333020 is an abundant number, since it is smaller than the sum of its proper divisors (301298666564).

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

215213333020 is a wasteful number, since it uses less digits than its factorization.

215213333020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537238109 (or 1537238107 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 215213333020 its reverse (20333312512), we get a palindrome (235546645532).

The spelling of 215213333020 in words is "two hundred fifteen billion, two hundred thirteen million, three hundred thirty-three thousand, twenty".