231027561031 has 2 divisors, whose sum is σ = 231027561032. Its totient is φ = 231027561030.

The previous prime is 231027560983. The next prime is 231027561043. The reversal of 231027561031 is 130165720132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231027561031 - 2¹³ = 231027552839 is a prime.

It is a super-2 number, since 2×231027561031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231027560984 and 231027561002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231027561091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115513780515 + 115513780516.

It is an arithmetic number, because the mean of its divisors is an integer number (115513780516).

Almost surely, 2^231027561031 is an apocalyptic number.

231027561031 is a deficient number, since it is larger than the sum of its proper divisors (1).

231027561031 is an equidigital number, since it uses as much as digits as its factorization.

231027561031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The spelling of 231027561031 in words is "two hundred thirty-one billion, twenty-seven million, five hundred sixty-one thousand, thirty-one".