231551534225351 has 2 divisors, whose sum is σ = 231551534225352. Its totient is φ = 231551534225350.

The previous prime is 231551534225273. The next prime is 231551534225369. The reversal of 231551534225351 is 153522435155132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231551534225351 - 2⁴⁶ = 161182790047687 is a prime.

It is a super-2 number, since 2×231551534225351² (a number of 30 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 231551534225296 and 231551534225305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231551534225371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115775767112675 + 115775767112676.

It is an arithmetic number, because the mean of its divisors is an integer number (115775767112676).

Almost surely, 2^{231551534225351} is an apocalyptic number.

231551534225351 is a deficient number, since it is larger than the sum of its proper divisors (1).

231551534225351 is an equidigital number, since it uses as much as digits as its factorization.

231551534225351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700000, while the sum is 47.

The spelling of 231551534225351 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, five hundred thirty-four million, two hundred twenty-five thousand, three hundred fifty-one".