321213053 has 16 divisors (see below), whose sum is σ = 376776576. Its totient is φ = 268107840.

The previous prime is 321213049. The next prime is 321213059. The reversal of 321213053 is 350312123.

It is not a de Polignac number, because 321213053 - 2² = 321213049 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321213059) 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, 110843 + ... + 113703.

It is an arithmetic number, because the mean of its divisors is an integer number (23548536).

Almost surely, 2^321213053 is an apocalyptic number.

It is an amenable number.

321213053 is a deficient number, since it is larger than the sum of its proper divisors (55563523).

321213053 is a wasteful number, since it uses less digits than its factorization.

321213053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3284.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 321213053 is about 17922.4176103560. The cubic root of 321213053 is about 684.8535769581.

Adding to 321213053 its reverse (350312123), we get a palindrome (671525176).

The spelling of 321213053 in words is "three hundred twenty-one million, two hundred thirteen thousand, fifty-three".