231020007 has 4 divisors (see below), whose sum is σ = 308026680. Its totient is φ = 154013336.

The previous prime is 231019991. The next prime is 231020047. The reversal of 231020007 is 700020132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231020007 - 2⁴ = 231019991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231020047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38503332 + ... + 38503337.

It is an arithmetic number, because the mean of its divisors is an integer number (77006670).

Almost surely, 2^231020007 is an apocalyptic number.

231020007 is a deficient number, since it is larger than the sum of its proper divisors (77006673).

231020007 is an equidigital number, since it uses as much as digits as its factorization.

231020007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77006672.

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 231020007 is about 15199.3423212980. The cubic root of 231020007 is about 613.5969575673.

Adding to 231020007 its reverse (700020132), we get a palindrome (931040139).

The spelling of 231020007 in words is "two hundred thirty-one million, twenty thousand, seven".