221427634851470 has 16 divisors (see below), whose sum is σ = 404518544864208. Its totient is φ = 87249097911360.

The previous prime is 221427634851461. The next prime is 221427634851491. The reversal of 221427634851470 is 74158436724122.

It is a super-2 number, since 2×221427634851470² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165244502951 + ... + 165244504290.

It is an arithmetic number, because the mean of its divisors is an integer number (25282409054013).

Almost surely, 2^{221427634851470} is an apocalyptic number.

221427634851470 is a deficient number, since it is larger than the sum of its proper divisors (183090910012738).

221427634851470 is a wasteful number, since it uses less digits than its factorization.

221427634851470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330489007315.

The product of its (nonzero) digits is 18063360, while the sum is 56.

The spelling of 221427634851470 in words is "two hundred twenty-one trillion, four hundred twenty-seven billion, six hundred thirty-four million, eight hundred fifty-one thousand, four hundred seventy".