31223141545 has 16 divisors (see below), whose sum is σ = 39786121728. Its totient is φ = 23441416960.

The previous prime is 31223141513. The next prime is 31223141557. The reversal of 31223141545 is 54514132213.

It is not a de Polignac number, because 31223141545 - 2⁵ = 31223141513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 499801 + ... + 558790.

It is an arithmetic number, because the mean of its divisors is an integer number (2486632608).

Almost surely, 2^31223141545 is an apocalyptic number.

It is an amenable number.

31223141545 is a deficient number, since it is larger than the sum of its proper divisors (8562980183).

31223141545 is a wasteful number, since it uses less digits than its factorization.

31223141545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058960.

The product of its digits is 14400, while the sum is 31.

Adding to 31223141545 its reverse (54514132213), we get a palindrome (85737273758).

The spelling of 31223141545 in words is "thirty-one billion, two hundred twenty-three million, one hundred forty-one thousand, five hundred forty-five".