31550434425 has 36 divisors (see below), whose sum is σ = 56520422764. Its totient is φ = 16823894400.

The previous prime is 31550434393. The next prime is 31550434429. The reversal of 31550434425 is 52443405513.

31550434425 is a `hidden beast` number, since 3 + 1 + 550 + 43 + 44 + 25 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 578306304 + 30972128121 = 24048^2 + 175989^2 .

It is not a de Polignac number, because 31550434425 - 2⁵ = 31550434393 is a prime.

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 31550434425.

It is not an unprimeable number, because it can be changed into a prime (31550434429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1895439 + ... + 1912011.

Almost surely, 2^31550434425 is an apocalyptic number.

It is an amenable number.

31550434425 is a deficient number, since it is larger than the sum of its proper divisors (24969988339).

31550434425 is a wasteful number, since it uses less digits than its factorization.

31550434425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25050 (or 25042 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 31550434425 its reverse (52443405513), we get a palindrome (83993839938).

The spelling of 31550434425 in words is "thirty-one billion, five hundred fifty million, four hundred thirty-four thousand, four hundred twenty-five".