31140201188 has 24 divisors (see below), whose sum is σ = 54683139000. Its totient is φ = 15516534528.

The previous prime is 31140201187. The next prime is 31140201271. The reversal of 31140201188 is 88110204113.

It can be written as a sum of positive squares in 4 ways, for example, as 20840387044 + 10299814144 = 144362^2 + 101488^2 .

It is a super-2 number, since 2×31140201188² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31140201188.

It is not an unprimeable number, because it can be changed into a prime (31140201187) 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, 1505138 + ... + 1525686.

It is an arithmetic number, because the mean of its divisors is an integer number (2278464125).

Almost surely, 2^31140201188 is an apocalyptic number.

It is an amenable number.

31140201188 is a deficient number, since it is larger than the sum of its proper divisors (23542937812).

31140201188 is a wasteful number, since it uses less digits than its factorization.

31140201188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21839 (or 21837 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 29.

The spelling of 31140201188 in words is "thirty-one billion, one hundred forty million, two hundred one thousand, one hundred eighty-eight".