34531021 has 16 divisors (see below), whose sum is σ = 40867200. Its totient is φ = 28562688.

The previous prime is 34531019. The next prime is 34531031. The reversal of 34531021 is 12013543.

It is not a de Polignac number, because 34531021 - 2¹ = 34531019 is a prime.

It is a super-2 number, since 2×34531021² = 2384782822604882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 34531021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34531031) 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, 26145 + ... + 27433.

It is an arithmetic number, because the mean of its divisors is an integer number (2554200).

Almost surely, 2^34531021 is an apocalyptic number.

It is an amenable number.

34531021 is a deficient number, since it is larger than the sum of its proper divisors (6336179).

34531021 is a wasteful number, since it uses less digits than its factorization.

34531021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 34531021 is about 5876.3101517874. The cubic root of 34531021 is about 325.6390455834.

Adding to 34531021 its reverse (12013543), we get a palindrome (46544564).

The spelling of 34531021 in words is "thirty-four million, five hundred thirty-one thousand, twenty-one".