31425232072 has 32 divisors (see below), whose sum is σ = 63917998200. Its totient is φ = 14398078464.

The previous prime is 31425232067. The next prime is 31425232099. The reversal of 31425232072 is 27023252413.

It can be written as a sum of positive squares in 4 ways, for example, as 26267981476 + 5157250596 = 162074^2 + 71814^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1088547 + ... + 1117042.

Almost surely, 2^31425232072 is an apocalyptic number.

It is an amenable number.

31425232072 is an abundant number, since it is smaller than the sum of its proper divisors (32492766128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31425232072 is a wasteful number, since it uses less digits than its factorization.

31425232072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2205745 (or 2205741 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 31.

Adding to 31425232072 its reverse (27023252413), we get a palindrome (58448484485).

The spelling of 31425232072 in words is "thirty-one billion, four hundred twenty-five million, two hundred thirty-two thousand, seventy-two".