231020502 has 16 divisors (see below), whose sum is σ = 465366720. Its totient is φ = 76452552.

The previous prime is 231020501. The next prime is 231020509. The reversal of 231020502 is 205020132.

231020502 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231020501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137668 + ... + 139335.

It is an arithmetic number, because the mean of its divisors is an integer number (29085420).

Almost surely, 2^231020502 is an apocalyptic number.

231020502 is an abundant number, since it is smaller than the sum of its proper divisors (234346218).

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

231020502 is a wasteful number, since it uses less digits than its factorization.

231020502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277147.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 231020502 is about 15199.3586048886. The cubic root of 231020502 is about 613.5973958125.

Adding to 231020502 its reverse (205020132), we get a palindrome (436040634).

The spelling of 231020502 in words is "two hundred thirty-one million, twenty thousand, five hundred two".