1953128231 has 2 divisors, whose sum is σ = 1953128232. Its totient is φ = 1953128230.

The previous prime is 1953128201. The next prime is 1953128239. The reversal of 1953128231 is 1328213591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1953128231 - 2¹⁰ = 1953127207 is a prime.

It is a super-2 number, since 2×1953128231² = 7629419773458378722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1953128191 and 1953128200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1953128239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976564115 + 976564116.

It is an arithmetic number, because the mean of its divisors is an integer number (976564116).

Almost surely, 2^1953128231 is an apocalyptic number.

1953128231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1953128231 is an equidigital number, since it uses as much as digits as its factorization.

1953128231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 35.

The square root of 1953128231 is about 44194.2103787363. The cubic root of 1953128231 is about 1250.0006892796. Note that the first 3 decimals are identical.

The spelling of 1953128231 in words is "one billion, nine hundred fifty-three million, one hundred twenty-eight thousand, two hundred thirty-one".