31443130393444 has 144 divisors (see below), whose sum is σ = 71612237571840. Its totient is φ = 11810640441600.

The previous prime is 31443130393429. The next prime is 31443130393459. The reversal of 31443130393444 is 44439303134413.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31443130393429) and next prime (31443130393459).

It is a super-2 number, since 2×31443130393444² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31443130393394 and 31443130393403.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66280249 + ... + 66752959.

It is an arithmetic number, because the mean of its divisors is an integer number (497307205360).

Almost surely, 2^{31443130393444} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31443130393444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35806118785920).

31443130393444 is an abundant number, since it is smaller than the sum of its proper divisors (40169107178396).

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

31443130393444 is a wasteful number, since it uses less digits than its factorization.

31443130393444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473450 (or 473437 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 46.

The spelling of 31443130393444 in words is "thirty-one trillion, four hundred forty-three billion, one hundred thirty million, three hundred ninety-three thousand, four hundred forty-four".