31311442420040 has 32 divisors (see below), whose sum is σ = 74594906943480. Its totient is φ = 11787837146112.

The previous prime is 31311442420019. The next prime is 31311442420079. The reversal of 31311442420040 is 4002424411313.

It can be written as a sum of positive squares in 4 ways, for example, as 28282847058244 + 3028595361796 = 5318162^2 + 1740286^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31311442419985 and 31311442420012.

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, 23023118747 + ... + 23023120106.

Almost surely, 2^{31311442420040} is an apocalyptic number.

It is an amenable number.

31311442420040 is an abundant number, since it is smaller than the sum of its proper divisors (43283464523440).

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

31311442420040 is a wasteful number, since it uses less digits than its factorization.

31311442420040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46046238881 (or 46046238877 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 31311442420040 its reverse (4002424411313), we get a palindrome (35313866831353).

The spelling of 31311442420040 in words is "thirty-one trillion, three hundred eleven billion, four hundred forty-two million, four hundred twenty thousand, forty".