31541245140 has 24 divisors (see below), whose sum is σ = 88315486560. Its totient is φ = 8410998688.

The previous prime is 31541245139. The next prime is 31541245189. The reversal of 31541245140 is 4154214513.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 31541245098 and 31541245107.

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, 262843650 + ... + 262843769.

It is an arithmetic number, because the mean of its divisors is an integer number (3679811940).

Almost surely, 2^31541245140 is an apocalyptic number.

31541245140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31541245140 is an abundant number, since it is smaller than the sum of its proper divisors (56774241420).

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

31541245140 is a wasteful number, since it uses less digits than its factorization.

31541245140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525687431 (or 525687429 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 31541245140 its reverse (4154214513), we get a palindrome (35695459653).

The spelling of 31541245140 in words is "thirty-one billion, five hundred forty-one million, two hundred forty-five thousand, one hundred forty".