31111434 has 48 divisors (see below), whose sum is σ = 69137640. Its totient is φ = 10108800.

The previous prime is 31111429. The next prime is 31111481. The reversal of 31111434 is 43411113.

It can be written as a sum of positive squares in 4 ways, for example, as 30769209 + 342225 = 5547^2 + 585^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198084 + ... + 198240.

Almost surely, 2^31111434 is an apocalyptic number.

31111434 is an abundant number, since it is smaller than the sum of its proper divisors (38026206).

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

31111434 is a wasteful number, since it uses less digits than its factorization.

31111434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375 (or 372 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 31111434 is about 5577.7624546049. The cubic root of 31111434 is about 314.5140200823.

Adding to 31111434 its reverse (43411113), we get a palindrome (74522547).

The spelling of 31111434 in words is "thirty-one million, one hundred eleven thousand, four hundred thirty-four".