1131225444 has 36 divisors (see below), whose sum is σ = 2872104144. Its totient is φ = 375411312.

The previous prime is 1131225427. The next prime is 1131225461. The reversal of 1131225444 is 4445221311.

1131225444 is a `hidden beast` number, since 113 + 1 + 2 + 2 + 544 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (1131225427) and next prime (1131225461).

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61042 + ... + 77385.

Almost surely, 2^1131225444 is an apocalyptic number.

It is an amenable number.

1131225444 is an abundant number, since it is smaller than the sum of its proper divisors (1740878700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131225444 is a wasteful number, since it uses less digits than its factorization.

1131225444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138664 (or 138659 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 1131225444 is about 33633.6950690821. The cubic root of 1131225444 is about 1041.9568200123.

Adding to 1131225444 its reverse (4445221311), we get a palindrome (5576446755).

The spelling of 1131225444 in words is "one billion, one hundred thirty-one million, two hundred twenty-five thousand, four hundred forty-four".