31533420445 has 16 divisors (see below), whose sum is σ = 40139299008. Its totient is φ = 23699370240.

The previous prime is 31533420419. The next prime is 31533420461. The reversal of 31533420445 is 54402433513.

It is a happy number.

It is not a de Polignac number, because 31533420445 - 2²⁹ = 30996549533 is a prime.

It is a super-2 number, since 2×31533420445² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31533420445.

It is a congruent 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, 292611 + ... + 385600.

It is an arithmetic number, because the mean of its divisors is an integer number (2508706188).

Almost surely, 2^31533420445 is an apocalyptic number.

It is an amenable number.

31533420445 is a deficient number, since it is larger than the sum of its proper divisors (8605878563).

31533420445 is a wasteful number, since it uses less digits than its factorization.

31533420445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678780.

The product of its (nonzero) digits is 86400, while the sum is 34.

Adding to 31533420445 its reverse (54402433513), we get a palindrome (85935853958).

The spelling of 31533420445 in words is "thirty-one billion, five hundred thirty-three million, four hundred twenty thousand, four hundred forty-five".