145221116431 has 2 divisors, whose sum is σ = 145221116432. Its totient is φ = 145221116430.

The previous prime is 145221116423. The next prime is 145221116437. The reversal of 145221116431 is 134611122541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145221116431 - 2³ = 145221116423 is a prime.

It is a super-2 number, since 2×145221116431² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145221116393 and 145221116402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145221116437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72610558215 + 72610558216.

It is an arithmetic number, because the mean of its divisors is an integer number (72610558216).

Almost surely, 2^145221116431 is an apocalyptic number.

145221116431 is a deficient number, since it is larger than the sum of its proper divisors (1).

145221116431 is an equidigital number, since it uses as much as digits as its factorization.

145221116431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 31.

Adding to 145221116431 its reverse (134611122541), we get a palindrome (279832238972).

The spelling of 145221116431 in words is "one hundred forty-five billion, two hundred twenty-one million, one hundred sixteen thousand, four hundred thirty-one".