31115345430 has 96 divisors (see below), whose sum is σ = 82189516320. Its totient is φ = 7533527040.

The previous prime is 31115345419. The next prime is 31115345449. The reversal of 31115345430 is 3454351113.

It is a super-3 number, since 3×31115345430³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 258966 + ... + 359574.

It is an arithmetic number, because the mean of its divisors is an integer number (856140795).

Almost surely, 2^31115345430 is an apocalyptic number.

31115345430 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31115345430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41094758160).

31115345430 is an abundant number, since it is smaller than the sum of its proper divisors (51074170890).

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

31115345430 is a wasteful number, since it uses less digits than its factorization.

31115345430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100706 (or 100693 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 31115345430 its reverse (3454351113), we get a palindrome (34569696543).

The spelling of 31115345430 in words is "thirty-one billion, one hundred fifteen million, three hundred forty-five thousand, four hundred thirty".