221431434440402 has 8 divisors (see below), whose sum is σ = 332150549148912. Its totient is φ = 110714584724100.

The previous prime is 221431434440327. The next prime is 221431434440423. The reversal of 221431434440402 is 204044434134122.

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

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, 566003624 + ... + 566394707.

It is an arithmetic number, because the mean of its divisors is an integer number (41518818643614).

Almost surely, 2^{221431434440402} is an apocalyptic number.

221431434440402 is a deficient number, since it is larger than the sum of its proper divisors (110719114708510).

221431434440402 is a wasteful number, since it uses less digits than its factorization.

221431434440402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132496104.

The product of its (nonzero) digits is 294912, while the sum is 38.

Adding to 221431434440402 its reverse (204044434134122), we get a palindrome (425475868574524).

The spelling of 221431434440402 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, four hundred thirty-four million, four hundred forty thousand, four hundred two".