31420550345 has 4 divisors (see below), whose sum is σ = 37704660420. Its totient is φ = 25136440272.

The previous prime is 31420550333. The next prime is 31420550383. The reversal of 31420550345 is 54305502413.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4422117001 + 26998433344 = 66499^2 + 164312^2 .

It is a cyclic number.

It is not a de Polignac number, because 31420550345 - 2¹² = 31420546249 is a prime.

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, 3142055030 + ... + 3142055039.

It is an arithmetic number, because the mean of its divisors is an integer number (9426165105).

Almost surely, 2^31420550345 is an apocalyptic number.

It is an amenable number.

31420550345 is a deficient number, since it is larger than the sum of its proper divisors (6284110075).

31420550345 is an equidigital number, since it uses as much as digits as its factorization.

31420550345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6284110074.

The product of its (nonzero) digits is 36000, while the sum is 32.

The spelling of 31420550345 in words is "thirty-one billion, four hundred twenty million, five hundred fifty thousand, three hundred forty-five".