231720054 has 32 divisors (see below), whose sum is σ = 468357120. Its totient is φ = 76425600.

The previous prime is 231720037. The next prime is 231720059. The reversal of 231720054 is 450027132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231720059) 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, 275767 + ... + 276605.

It is an arithmetic number, because the mean of its divisors is an integer number (14636160).

Almost surely, 2^231720054 is an apocalyptic number.

231720054 is an abundant number, since it is smaller than the sum of its proper divisors (236637066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231720054 is a wasteful number, since it uses less digits than its factorization.

231720054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 231720054 is about 15222.3537601778. The cubic root of 231720054 is about 614.2161154298.

Adding to 231720054 its reverse (450027132), we get a palindrome (681747186).

The spelling of 231720054 in words is "two hundred thirty-one million, seven hundred twenty thousand, fifty-four".