31428551248 has 40 divisors (see below), whose sum is σ = 62557949160. Its totient is φ = 15284828160.

The previous prime is 31428551239. The next prime is 31428551267. The reversal of 31428551248 is 84215582413.

It can be written as a sum of positive squares in 4 ways, for example, as 5569338384 + 25859212864 = 74628^2 + 160808^2 .

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 2604108 + ... + 2616148.

It is an arithmetic number, because the mean of its divisors is an integer number (1563948729).

Almost surely, 2^31428551248 is an apocalyptic number.

It is an amenable number.

31428551248 is a deficient number, since it is larger than the sum of its proper divisors (31129397912).

31428551248 is a wasteful number, since it uses less digits than its factorization.

31428551248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16495 (or 16489 counting only the distinct ones).

The product of its digits is 307200, while the sum is 43.

The spelling of 31428551248 in words is "thirty-one billion, four hundred twenty-eight million, five hundred fifty-one thousand, two hundred forty-eight".