1381824231 has 4 divisors (see below), whose sum is σ = 1842432312. Its totient is φ = 921216152.

The previous prime is 1381824203. The next prime is 1381824233. The reversal of 1381824231 is 1324281831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1381824231 - 2¹⁸ = 1381562087 is a prime.

It is a super-2 number, since 2×1381824231² = 3818876410757482722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1381824192 and 1381824201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381824233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230304036 + ... + 230304041.

It is an arithmetic number, because the mean of its divisors is an integer number (460608078).

Almost surely, 2^1381824231 is an apocalyptic number.

1381824231 is a deficient number, since it is larger than the sum of its proper divisors (460608081).

1381824231 is an equidigital number, since it uses as much as digits as its factorization.

1381824231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460608080.

The product of its digits is 9216, while the sum is 33.

The square root of 1381824231 is about 37172.8964569618. The cubic root of 1381824231 is about 1113.8266410117.

The spelling of 1381824231 in words is "one billion, three hundred eighty-one million, eight hundred twenty-four thousand, two hundred thirty-one".