221431422245007 has 16 divisors (see below), whose sum is σ = 318040960455680. Its totient is φ = 136227712457952.

The previous prime is 221431422245003. The next prime is 221431422245063. The reversal of 221431422245007 is 700542224134122.

It is not a de Polignac number, because 221431422245007 - 2² = 221431422245003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221431422245003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 786902407 + ... + 787183752.

It is an arithmetic number, because the mean of its divisors is an integer number (19877560028480).

Almost surely, 2^{221431422245007} is an apocalyptic number.

221431422245007 is a deficient number, since it is larger than the sum of its proper divisors (96609538210673).

221431422245007 is a wasteful number, since it uses less digits than its factorization.

221431422245007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574089782.

The product of its (nonzero) digits is 215040, while the sum is 39.

Adding to 221431422245007 its reverse (700542224134122), we get a palindrome (921973646379129).

The spelling of 221431422245007 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, four hundred twenty-two million, two hundred forty-five thousand, seven".