232121505 has 32 divisors (see below), whose sum is σ = 463039488. Its totient is φ = 96465600.

The previous prime is 232121501. The next prime is 232121551. The reversal of 232121505 is 505121232.

It is not a de Polignac number, because 232121505 - 2² = 232121501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (232121501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99331 + ... + 101640.

It is an arithmetic number, because the mean of its divisors is an integer number (14469984).

Almost surely, 2^232121505 is an apocalyptic number.

It is an amenable number.

232121505 is a deficient number, since it is larger than the sum of its proper divisors (230917983).

232121505 is a wasteful number, since it uses less digits than its factorization.

232121505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200997.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 232121505 is about 15235.5342866602. The cubic root of 232121505 is about 614.5706170640.

Adding to 232121505 its reverse (505121232), we get a palindrome (737242737).

The spelling of 232121505 in words is "two hundred thirty-two million, one hundred twenty-one thousand, five hundred five".