221464287270 has 64 divisors (see below), whose sum is σ = 591300218880. Its totient is φ = 58984264800.

The previous prime is 221464287257. The next prime is 221464287287. The reversal of 221464287270 is 72782464122.

221464287270 is a `hidden beast` number, since 2 + 214 + 6 + 428 + 7 + 2 + 7 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 286726 + ... + 724665.

It is an arithmetic number, because the mean of its divisors is an integer number (9239065920).

Almost surely, 2^221464287270 is an apocalyptic number.

221464287270 is an abundant number, since it is smaller than the sum of its proper divisors (369835931610).

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

221464287270 is a wasteful number, since it uses less digits than its factorization.

221464287270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012218 (or 1012212 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 45.

The spelling of 221464287270 in words is "two hundred twenty-one billion, four hundred sixty-four million, two hundred eighty-seven thousand, two hundred seventy".