215033547640 has 64 divisors (see below), whose sum is σ = 505250472960. Its totient is φ = 82210296960.

The previous prime is 215033547629. The next prime is 215033547671. The reversal of 215033547640 is 46745330512.

It is a happy number.

It is a super-2 number, since 2×215033547640² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 215033547593 and 215033547602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1113025 + ... + 1291855.

It is an arithmetic number, because the mean of its divisors is an integer number (7894538640).

Almost surely, 2^215033547640 is an apocalyptic number.

215033547640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215033547640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252625236480).

215033547640 is an abundant number, since it is smaller than the sum of its proper divisors (290216925320).

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

215033547640 is a wasteful number, since it uses less digits than its factorization.

215033547640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180172 (or 180168 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 40.

The spelling of 215033547640 in words is "two hundred fifteen billion, thirty-three million, five hundred forty-seven thousand, six hundred forty".