31303423032140 has 48 divisors (see below), whose sum is σ = 79547522064192. Its totient is φ = 10101272641536.

The previous prime is 31303423032121. The next prime is 31303423032143. The reversal of 31303423032140 is 4123032430313.

It is a super-2 number, since 2×31303423032140² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31303423032143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6576346997 + ... + 6576351756.

It is an arithmetic number, because the mean of its divisors is an integer number (1657240043004).

Almost surely, 2^{31303423032140} is an apocalyptic number.

It is an amenable number.

31303423032140 is an abundant number, since it is smaller than the sum of its proper divisors (48244099032052).

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

31303423032140 is a wasteful number, since it uses less digits than its factorization.

31303423032140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13152698786 (or 13152698784 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 29.

Adding to 31303423032140 its reverse (4123032430313), we get a palindrome (35426455462453).

The spelling of 31303423032140 in words is "thirty-one trillion, three hundred three billion, four hundred twenty-three million, thirty-two thousand, one hundred forty".