221412215461 has 8 divisors (see below), whose sum is σ = 230651379200. Its totient is φ = 212304103920.

The previous prime is 221412215459. The next prime is 221412215483. The reversal of 221412215461 is 164512214122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221412215461 - 2¹ = 221412215459 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221412215411) 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, 32759601 + ... + 32766358.

It is an arithmetic number, because the mean of its divisors is an integer number (28831422400).

Almost surely, 2^221412215461 is an apocalyptic number.

It is an amenable number.

221412215461 is a deficient number, since it is larger than the sum of its proper divisors (9239163739).

221412215461 is a wasteful number, since it uses less digits than its factorization.

221412215461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65526099.

The product of its digits is 7680, while the sum is 31.

Adding to 221412215461 its reverse (164512214122), we get a palindrome (385924429583).

The spelling of 221412215461 in words is "two hundred twenty-one billion, four hundred twelve million, two hundred fifteen thousand, four hundred sixty-one".