231552145305 has 48 divisors (see below), whose sum is σ = 432323083920. Its totient is φ = 113970530304.

The previous prime is 231552145303. The next prime is 231552145337. The reversal of 231552145305 is 503541255132.

231552145305 is a `hidden beast` number, since 2 + 31 + 552 + 1 + 45 + 30 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 13518247824 + 218033897481 = 116268^2 + 466941^2 .

It is not a de Polignac number, because 231552145305 - 2¹ = 231552145303 is a prime.

It is a super-3 number, since 3×231552145305³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231552145305.

It is not an unprimeable number, because it can be changed into a prime (231552145303) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2867037 + ... + 2946693.

It is an arithmetic number, because the mean of its divisors is an integer number (9006730915).

Almost surely, 2^231552145305 is an apocalyptic number.

It is an amenable number.

231552145305 is a deficient number, since it is larger than the sum of its proper divisors (200770938615).

231552145305 is a wasteful number, since it uses less digits than its factorization.

231552145305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84650 (or 84647 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 231552145305 in words is "two hundred thirty-one billion, five hundred fifty-two million, one hundred forty-five thousand, three hundred five".