221431041225154 has 16 divisors (see below), whose sum is σ = 332362799403768. Its totient is φ = 110643462173952.

The previous prime is 221431041225071. The next prime is 221431041225307. The reversal of 221431041225154 is 451522140134122.

It can be written as a sum of positive squares in 4 ways, for example, as 159845069710225 + 61585971514929 = 12642985^2 + 7847673^2 .

It is a super-2 number, since 2×221431041225154² (a number of 29 digits) contains 22 as substring.

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, 16172964 + ... + 26541040.

Almost surely, 2^{221431041225154} is an apocalyptic number.

221431041225154 is a deficient number, since it is larger than the sum of its proper divisors (110931758178614).

221431041225154 is a wasteful number, since it uses less digits than its factorization.

221431041225154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10375029.

The product of its (nonzero) digits is 76800, while the sum is 37.

Adding to 221431041225154 its reverse (451522140134122), we get a palindrome (672953181359276).

The spelling of 221431041225154 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, forty-one million, two hundred twenty-five thousand, one hundred fifty-four".