231421051 has 16 divisors (see below), whose sum is σ = 253725696. Its totient is φ = 210180096.

The previous prime is 231421039. The next prime is 231421079. The reversal of 231421051 is 150124132.

It is a cyclic number.

It is not a de Polignac number, because 231421051 - 2⁵ = 231421019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231421651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78435 + ... + 81331.

It is an arithmetic number, because the mean of its divisors is an integer number (15857856).

Almost surely, 2^231421051 is an apocalyptic number.

231421051 is a deficient number, since it is larger than the sum of its proper divisors (22304645).

231421051 is a wasteful number, since it uses less digits than its factorization.

231421051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3078.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 231421051 is about 15212.5294083528. The cubic root of 231421051 is about 613.9518144519.

Adding to 231421051 its reverse (150124132), we get a palindrome (381545183).

The spelling of 231421051 in words is "two hundred thirty-one million, four hundred twenty-one thousand, fifty-one".