215044145340 has 48 divisors (see below), whose sum is σ = 602194693632. Its totient is φ = 57338335296.

The previous prime is 215044145339. The next prime is 215044145389. The reversal of 215044145340 is 43541440512.

It is a happy number.

It is a super-2 number, since 2×215044145340² (a number of 23 digits) contains 22 as substring.

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, 311577 + ... + 726063.

It is an arithmetic number, because the mean of its divisors is an integer number (12545722784).

Almost surely, 2^215044145340 is an apocalyptic number.

215044145340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215044145340 is an abundant number, since it is smaller than the sum of its proper divisors (387150548292).

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

215044145340 is a wasteful number, since it uses less digits than its factorization.

215044145340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423146 (or 423144 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 215044145340 its reverse (43541440512), we get a palindrome (258585585852).

The spelling of 215044145340 in words is "two hundred fifteen billion, forty-four million, one hundred forty-five thousand, three hundred forty".