221535315340 has 24 divisors (see below), whose sum is σ = 467823187440. Its totient is φ = 88119073728.

The previous prime is 221535315269. The next prime is 221535315349. The reversal of 221535315340 is 43513535122.

It is a junction number, because it is equal to n+sod(n) for n = 221535315296 and 221535315305.

It is not an unprimeable number, because it can be changed into a prime (221535315349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30937107 + ... + 30944266.

It is an arithmetic number, because the mean of its divisors is an integer number (19492632810).

Almost surely, 2^221535315340 is an apocalyptic number.

221535315340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221535315340 is an abundant number, since it is smaller than the sum of its proper divisors (246287872100).

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

221535315340 is a wasteful number, since it uses less digits than its factorization.

221535315340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61881561 (or 61881559 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 34.

The spelling of 221535315340 in words is "two hundred twenty-one billion, five hundred thirty-five million, three hundred fifteen thousand, three hundred forty".