215300554340 has 24 divisors (see below), whose sum is σ = 452330523960. Its totient is φ = 86082248448.

The previous prime is 215300554331. The next prime is 215300554361. The reversal of 215300554340 is 43455003512.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 247621696 + 215052932644 = 15736^2 + 463738^2 .

It is a super-2 number, since 2×215300554340² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 215300554297 and 215300554306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2326817 + ... + 2417576.

It is an arithmetic number, because the mean of its divisors is an integer number (18847105165).

Almost surely, 2^215300554340 is an apocalyptic number.

215300554340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215300554340 is an abundant number, since it is smaller than the sum of its proper divisors (237029969620).

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

215300554340 is a wasteful number, since it uses less digits than its factorization.

215300554340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4746671 (or 4746669 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

Adding to 215300554340 its reverse (43455003512), we get a palindrome (258755557852).

The spelling of 215300554340 in words is "two hundred fifteen billion, three hundred million, five hundred fifty-four thousand, three hundred forty".