221461540915 has 16 divisors (see below), whose sum is σ = 265989832416. Its totient is φ = 177012000000.

The previous prime is 221461540907. The next prime is 221461540919. The reversal of 221461540915 is 519045164122.

It is not a de Polignac number, because 221461540915 - 2³ = 221461540907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221461540919) 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, 40255665 + ... + 40261165.

It is an arithmetic number, because the mean of its divisors is an integer number (16624364526).

Almost surely, 2^221461540915 is an apocalyptic number.

221461540915 is a deficient number, since it is larger than the sum of its proper divisors (44528291501).

221461540915 is a wasteful number, since it uses less digits than its factorization.

221461540915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11190.

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 221461540915 in words is "two hundred twenty-one billion, four hundred sixty-one million, five hundred forty thousand, nine hundred fifteen".