31434534 has 32 divisors (see below), whose sum is σ = 71747040. Its totient is φ = 10194336.

The previous prime is 31434523. The next prime is 31434539. The reversal of 31434534 is 43543413.

31434534 is a `hidden beast` number, since 314 + 345 + 3 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 31434498 and 31434507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31434539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5869 + ... + 9864.

It is an arithmetic number, because the mean of its divisors is an integer number (2242095).

Almost surely, 2^31434534 is an apocalyptic number.

31434534 is an abundant number, since it is smaller than the sum of its proper divisors (40312506).

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

31434534 is a wasteful number, since it uses less digits than its factorization.

31434534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15781 (or 15775 counting only the distinct ones).

The product of its digits is 8640, while the sum is 27.

The square root of 31434534 is about 5606.6508719556. The cubic root of 31434534 is about 315.5990414752.

Adding to 31434534 its reverse (43543413), we get a palindrome (74977947).

The spelling of 31434534 in words is "thirty-one million, four hundred thirty-four thousand, five hundred thirty-four".