31204414545012 has 18 divisors (see below), whose sum is σ = 78877825655538. Its totient is φ = 10401471514992.

The previous prime is 31204414544993. The next prime is 31204414545013. The reversal of 31204414545012 is 21054541440213.

31204414545012 is a `hidden beast` number, since 3 + 1 + 2 + 0 + 4 + 4 + 145 + 4 + 501 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 28764707999076 + 2439706545936 = 5363274^2 + 1561956^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 866789292917 = 31204414545012 / (3 + 1 + 2 + 0 + 4 + 4 + 1 + 4 + 5 + 4 + 5 + 0 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31204414545013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 433394646423 + ... + 433394646494.

Almost surely, 2^{31204414545012} is an apocalyptic number.

It is an amenable number.

31204414545012 is an abundant number, since it is smaller than the sum of its proper divisors (47673411110526).

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

31204414545012 is a wasteful number, since it uses less digits than its factorization.

31204414545012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866789292927 (or 866789292922 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 31204414545012 its reverse (21054541440213), we get a palindrome (52258955985225).

The spelling of 31204414545012 in words is "thirty-one trillion, two hundred four billion, four hundred fourteen million, five hundred forty-five thousand, twelve".