1375864231 has 4 divisors (see below), whose sum is σ = 1572416272. Its totient is φ = 1179312192.

The previous prime is 1375864219. The next prime is 1375864297. The reversal of 1375864231 is 1324685731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1324685731 = 2957 ⋅447983.

It is a cyclic number.

It is not a de Polignac number, because 1375864231 - 2⁹ = 1375863719 is a prime.

It is a super-2 number, since 2×1375864231² = 3786004764290442722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375864031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98276010 + ... + 98276023.

It is an arithmetic number, because the mean of its divisors is an integer number (393104068).

Almost surely, 2^1375864231 is an apocalyptic number.

1375864231 is a deficient number, since it is larger than the sum of its proper divisors (196552041).

1375864231 is an equidigital number, since it uses as much as digits as its factorization.

1375864231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196552040.

The product of its digits is 120960, while the sum is 40.

The square root of 1375864231 is about 37092.6438933652. The cubic root of 1375864231 is about 1112.2229701322. Note that the first 3 decimals are identical.

The spelling of 1375864231 in words is "one billion, three hundred seventy-five million, eight hundred sixty-four thousand, two hundred thirty-one".