221461512 has 16 divisors (see below), whose sum is σ = 553653840. Its totient is φ = 73820496.

The previous prime is 221461477. The next prime is 221461543. The reversal of 221461512 is 215164122.

It is a super-2 number, since 2×221461512² = 98090402594652288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 9227563 = 221461512 / (2 + 2 + 1 + 4 + 6 + 1 + 5 + 1 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4613758 + ... + 4613805.

It is an arithmetic number, because the mean of its divisors is an integer number (34603365).

Almost surely, 2^221461512 is an apocalyptic number.

It is an amenable number.

221461512 is an abundant number, since it is smaller than the sum of its proper divisors (332192328).

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

221461512 is a wasteful number, since it uses less digits than its factorization.

221461512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9227572 (or 9227568 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 221461512 is about 14881.5829803150. The cubic root of 221461512 is about 605.0149230206.

The spelling of 221461512 in words is "two hundred twenty-one million, four hundred sixty-one thousand, five hundred twelve".