31350204540 has 36 divisors (see below), whose sum is σ = 95095620984. Its totient is φ = 8360054496.

The previous prime is 31350204539. The next prime is 31350204569. The reversal of 31350204540 is 4540205313.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×31350204540² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87083722 + ... + 87084081.

Almost surely, 2^31350204540 is an apocalyptic number.

31350204540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31350204540 is an abundant number, since it is smaller than the sum of its proper divisors (63745416444).

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

31350204540 is a wasteful number, since it uses less digits than its factorization.

31350204540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174167818 (or 174167813 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 31350204540 its reverse (4540205313), we get a palindrome (35890409853).

The spelling of 31350204540 in words is "thirty-one billion, three hundred fifty million, two hundred four thousand, five hundred forty".