31403203311440 has 40 divisors (see below), whose sum is σ = 74012618229288. Its totient is φ = 12389208975360.

The previous prime is 31403203311437. The next prime is 31403203311449. The reversal of 31403203311440 is 4411330230413.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 219600955456 + 31183602355984 = 468616^2 + 5584228^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×31403203311440² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31403203311449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2688624581 + ... + 2688636260.

Almost surely, 2^{31403203311440} is an apocalyptic number.

It is an amenable number.

31403203311440 is an abundant number, since it is smaller than the sum of its proper divisors (42609414917848).

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

31403203311440 is a wasteful number, since it uses less digits than its factorization.

31403203311440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5377260927 (or 5377260921 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 31403203311440 its reverse (4411330230413), we get a palindrome (35814533541853).

The spelling of 31403203311440 in words is "thirty-one trillion, four hundred three billion, two hundred three million, three hundred eleven thousand, four hundred forty".