1320627231 has 24 divisors (see below), whose sum is σ = 2378273664. Its totient is φ = 686039760.

The previous prime is 1320627229. The next prime is 1320627233. The reversal of 1320627231 is 1327260231.

1320627231 is a `hidden beast` number, since 1 + 3 + 2 + 0 + 627 + 2 + 31 = 666.

It is an interprime number because it is at equal distance from previous prime (1320627229) and next prime (1320627233).

It is not a de Polignac number, because 1320627231 - 2¹ = 1320627229 is a prime.

It is a super-2 number, since 2×1320627231² = 3488112566517454722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1320627195 and 1320627204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320627233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 952141 + ... + 953526.

It is an arithmetic number, because the mean of its divisors is an integer number (99094736).

Almost surely, 2^1320627231 is an apocalyptic number.

1320627231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1320627231 is a deficient number, since it is larger than the sum of its proper divisors (1057646433).

1320627231 is a wasteful number, since it uses less digits than its factorization.

1320627231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905691 (or 1905688 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 1320627231 is about 36340.4352065299. The cubic root of 1320627231 is about 1097.1350325035.

Adding to 1320627231 its reverse (1327260231), we get a palindrome (2647887462).

The spelling of 1320627231 in words is "one billion, three hundred twenty million, six hundred twenty-seven thousand, two hundred thirty-one".