1445431523431 has 6 divisors (see below), whose sum is σ = 1681420343640. Its totient is φ = 1238941305756.

The previous prime is 1445431523423. The next prime is 1445431523491. The reversal of 1445431523431 is 1343251345441.

It is not a de Polignac number, because 1445431523431 - 2³ = 1445431523423 is a prime.

It is a super-2 number, since 2×1445431523431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445431523491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14749301211 + ... + 14749301308.

It is an arithmetic number, because the mean of its divisors is an integer number (280236723940).

Almost surely, 2^{1445431523431} is an apocalyptic number.

1445431523431 is a deficient number, since it is larger than the sum of its proper divisors (235988820209).

1445431523431 is an equidigital number, since it uses as much as digits as its factorization.

1445431523431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29498602533 (or 29498602526 counting only the distinct ones).

The product of its digits is 345600, while the sum is 40.

Adding to 1445431523431 its reverse (1343251345441), we get a palindrome (2788682868872).

The spelling of 1445431523431 in words is "one trillion, four hundred forty-five billion, four hundred thirty-one million, five hundred twenty-three thousand, four hundred thirty-one".