31200130130240 has 56 divisors (see below), whose sum is σ = 75313053899880. Its totient is φ = 12309092425728.

The previous prime is 31200130130227. The next prime is 31200130130297. The reversal of 31200130130240 is 4203103100213.

It can be written as a sum of positive squares in 4 ways, for example, as 5485413673216 + 25714716457024 = 2342096^2 + 5070968^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 667787645 + ... + 667834364.

Almost surely, 2^{31200130130240} is an apocalyptic number.

It is an amenable number.

31200130130240 is an abundant number, since it is smaller than the sum of its proper divisors (44112923769640).

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

31200130130240 is a wasteful number, since it uses less digits than its factorization.

31200130130240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335622099 (or 1335622089 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31200130130240 its reverse (4203103100213), we get a palindrome (35403233230453).

The spelling of 31200130130240 in words is "thirty-one trillion, two hundred billion, one hundred thirty million, one hundred thirty thousand, two hundred forty".