21231034 has 8 divisors (see below), whose sum is σ = 34741728. Its totient is φ = 9650460.

The previous prime is 21231029. The next prime is 21231107. The reversal of 21231034 is 43013212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21230999 and 21231017.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482502 + ... + 482545.

It is an arithmetic number, because the mean of its divisors is an integer number (4342716).

Almost surely, 2^21231034 is an apocalyptic number.

21231034 is a deficient number, since it is larger than the sum of its proper divisors (13510694).

21231034 is a wasteful number, since it uses less digits than its factorization.

21231034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965060.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 21231034 is about 4607.7146178990. The cubic root of 21231034 is about 276.9004842640.

Adding to 21231034 its reverse (43013212), we get a palindrome (64244246).

The spelling of 21231034 in words is "twenty-one million, two hundred thirty-one thousand, thirty-four".