221435451131 has 8 divisors (see below), whose sum is σ = 222577074720. Its totient is φ = 220294005568.

The previous prime is 221435451121. The next prime is 221435451157. The reversal of 221435451131 is 131154534122.

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 221435451131 - 2⁶ = 221435451067 is a prime.

It is a super-2 number, since 2×221435451131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221435451121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2974775 + ... + 3048303.

It is an arithmetic number, because the mean of its divisors is an integer number (27822134340).

Almost surely, 2^221435451131 is an apocalyptic number.

221435451131 is a deficient number, since it is larger than the sum of its proper divisors (1141623589).

221435451131 is a wasteful number, since it uses less digits than its factorization.

221435451131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89013.

The product of its digits is 14400, while the sum is 32.

Adding to 221435451131 its reverse (131154534122), we get a palindrome (352589985253).

The spelling of 221435451131 in words is "two hundred twenty-one billion, four hundred thirty-five million, four hundred fifty-one thousand, one hundred thirty-one".