31401413032240 has 40 divisors (see below), whose sum is σ = 73009056027600. Its totient is φ = 12560432614656.

The previous prime is 31401413032237. The next prime is 31401413032243. The reversal of 31401413032240 is 4223031410413.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31401413032237) and next prime (31401413032243).

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

It is a super-2 number, since 2×31401413032240² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31401413032199 and 31401413032208.

It is not an unprimeable number, because it can be changed into a prime (31401413032243) 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, 5736411 + ... + 9783109.

It is an arithmetic number, because the mean of its divisors is an integer number (1825226400690).

Almost surely, 2^{31401413032240} is an apocalyptic number.

It is an amenable number.

31401413032240 is an abundant number, since it is smaller than the sum of its proper divisors (41607642995360).

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

31401413032240 is a wasteful number, since it uses less digits than its factorization.

31401413032240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4143709 (or 4143703 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 31401413032240 its reverse (4223031410413), we get a palindrome (35624444442653).

The spelling of 31401413032240 in words is "thirty-one trillion, four hundred one billion, four hundred thirteen million, thirty-two thousand, two hundred forty".