1148228231 has 4 divisors (see below), whose sum is σ = 1156993464. Its totient is φ = 1139463000.

The previous prime is 1148228219. The next prime is 1148228267. The reversal of 1148228231 is 1328228411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1328228411 = 17 ⋅78131083.

It is a cyclic number.

It is not a de Polignac number, because 1148228231 - 2¹⁰ = 1148227207 is a prime.

It is a super-2 number, since 2×1148228231² = 2636856140930778722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1148228131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4382420 + ... + 4382681.

It is an arithmetic number, because the mean of its divisors is an integer number (289248366).

Almost surely, 2^1148228231 is an apocalyptic number.

1148228231 is a deficient number, since it is larger than the sum of its proper divisors (8765233).

1148228231 is an equidigital number, since it uses as much as digits as its factorization.

1148228231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8765232.

The product of its digits is 6144, while the sum is 32.

The square root of 1148228231 is about 33885.5165373054. The cubic root of 1148228231 is about 1047.1512291181.

The spelling of 1148228231 in words is "one billion, one hundred forty-eight million, two hundred twenty-eight thousand, two hundred thirty-one".