215234042340 has 48 divisors (see below), whose sum is σ = 638105634432. Its totient is φ = 54019524096.

The previous prime is 215234042311. The next prime is 215234042363. The reversal of 215234042340 is 43240432512.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 215234042298 and 215234042307.

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, 105505864 + ... + 105507903.

It is an arithmetic number, because the mean of its divisors is an integer number (13293867384).

Almost surely, 2^215234042340 is an apocalyptic number.

215234042340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215234042340 is an abundant number, since it is smaller than the sum of its proper divisors (422871592092).

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

215234042340 is a wasteful number, since it uses less digits than its factorization.

215234042340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211013796 (or 211013794 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 215234042340 its reverse (43240432512), we get a palindrome (258474474852).

The spelling of 215234042340 in words is "two hundred fifteen billion, two hundred thirty-four million, forty-two thousand, three hundred forty".