215983348440 has 64 divisors (see below), whose sum is σ = 647989977600. Its totient is φ = 57592010112.

The previous prime is 215983348409. The next prime is 215983348447. The reversal of 215983348440 is 44843389512.

It is a super-4 number, since 4×215983348440⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215983348447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2323089 + ... + 2414271.

It is an arithmetic number, because the mean of its divisors is an integer number (10124843400).

Almost surely, 2^215983348440 is an apocalyptic number.

215983348440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215983348440 is an abundant number, since it is smaller than the sum of its proper divisors (432006629160).

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

215983348440 is a wasteful number, since it uses less digits than its factorization.

215983348440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110936 (or 110932 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 51.

The spelling of 215983348440 in words is "two hundred fifteen billion, nine hundred eighty-three million, three hundred forty-eight thousand, four hundred forty".