31771369340 has 24 divisors (see below), whose sum is σ = 69020562240. Its totient is φ = 12270321728.

The previous prime is 31771369339. The next prime is 31771369349. The reversal of 31771369340 is 4396317713.

It is a junction number, because it is equal to n+sod(n) for n = 31771369291 and 31771369300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31771369349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27388532 + ... + 27389691.

It is an arithmetic number, because the mean of its divisors is an integer number (2875856760).

Almost surely, 2^31771369340 is an apocalyptic number.

It is an amenable number.

31771369340 is an abundant number, since it is smaller than the sum of its proper divisors (37249192900).

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

31771369340 is a wasteful number, since it uses less digits than its factorization.

31771369340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54778261 (or 54778259 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 44.

The spelling of 31771369340 in words is "thirty-one billion, seven hundred seventy-one million, three hundred sixty-nine thousand, three hundred forty".