231780853 has 2 divisors, whose sum is σ = 231780854. Its totient is φ = 231780852.

The previous prime is 231780833. The next prime is 231780863. The reversal of 231780853 is 358087132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217356049 + 14424804 = 14743^2 + 3798^2 .

It is a cyclic number.

It is not a de Polignac number, because 231780853 - 2¹³ = 231772661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231780833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115890426 + 115890427.

It is an arithmetic number, because the mean of its divisors is an integer number (115890427).

Almost surely, 2^231780853 is an apocalyptic number.

It is an amenable number.

231780853 is a deficient number, since it is larger than the sum of its proper divisors (1).

231780853 is an equidigital number, since it uses as much as digits as its factorization.

231780853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 231780853 is about 15224.3506593877. The cubic root of 231780853 is about 614.2698303318.

The spelling of 231780853 in words is "two hundred thirty-one million, seven hundred eighty thousand, eight hundred fifty-three".