31442230525 has 6 divisors (see below), whose sum is σ = 38988365882. Its totient is φ = 25153784400.

The previous prime is 31442230471. The next prime is 31442230529. The reversal of 31442230525 is 52503224413.

It can be written as a sum of positive squares in 3 ways, for example, as 1576169401 + 29866061124 = 39701^2 + 172818^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31442230525 is a prime.

It is a super-2 number, since 2×31442230525² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442230529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 628844586 + ... + 628844635.

Almost surely, 2^31442230525 is an apocalyptic number.

It is an amenable number.

31442230525 is a deficient number, since it is larger than the sum of its proper divisors (7546135357).

31442230525 is a wasteful number, since it uses less digits than its factorization.

31442230525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257689231 (or 1257689226 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 31442230525 its reverse (52503224413), we get a palindrome (83945454938).

The spelling of 31442230525 in words is "thirty-one billion, four hundred forty-two million, two hundred thirty thousand, five hundred twenty-five".