215403545504240 has 80 divisors (see below), whose sum is σ = 503597326770720. Its totient is φ = 85682468551680.

The previous prime is 215403545504233. The next prime is 215403545504243. The reversal of 215403545504240 is 42405545304512.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 215403545504191 and 215403545504200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215403545504243) 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, 452653151 + ... + 453128769.

It is an arithmetic number, because the mean of its divisors is an integer number (6294966584634).

Almost surely, 2^{215403545504240} is an apocalyptic number.

215403545504240 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 215403545504240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251798663385360).

215403545504240 is an abundant number, since it is smaller than the sum of its proper divisors (288193781266480).

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

215403545504240 is a wasteful number, since it uses less digits than its factorization.

215403545504240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507090 (or 507084 counting only the distinct ones).

The product of its (nonzero) digits is 1920000, while the sum is 44.

The spelling of 215403545504240 in words is "two hundred fifteen trillion, four hundred three billion, five hundred forty-five million, five hundred four thousand, two hundred forty".