31434722545 has 4 divisors (see below), whose sum is σ = 37721667060. Its totient is φ = 25147778032.

The previous prime is 31434722507. The next prime is 31434722563. The reversal of 31434722545 is 54522743413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54522743413 = 1019 ⋅53506127.

It can be written as a sum of positive squares in 2 ways, for example, as 22404401761 + 9030320784 = 149681^2 + 95028^2 .

It is a cyclic number.

It is not a de Polignac number, because 31434722545 - 2¹¹ = 31434720497 is a prime.

It is a super-2 number, since 2×31434722545² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31434722498 and 31434722507.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3143472250 + ... + 3143472259.

It is an arithmetic number, because the mean of its divisors is an integer number (9430416765).

Almost surely, 2^31434722545 is an apocalyptic number.

It is an amenable number.

31434722545 is a deficient number, since it is larger than the sum of its proper divisors (6286944515).

31434722545 is an equidigital number, since it uses as much as digits as its factorization.

31434722545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6286944514.

The product of its digits is 403200, while the sum is 40.

The spelling of 31434722545 in words is "thirty-one billion, four hundred thirty-four million, seven hundred twenty-two thousand, five hundred forty-five".