1125213533 has 2 divisors, whose sum is σ = 1125213534. Its totient is φ = 1125213532.

The previous prime is 1125213517. The next prime is 1125213569. The reversal of 1125213533 is 3353125211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1093426489 + 31787044 = 33067^2 + 5638^2 .

It is an emirp because it is prime and its reverse (3353125211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1125213533 - 2⁴ = 1125213517 is a prime.

It is a super-2 number, since 2×1125213533² = 2532210989692684178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1125219533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562606766 + 562606767.

It is an arithmetic number, because the mean of its divisors is an integer number (562606767).

Almost surely, 2^1125213533 is an apocalyptic number.

It is an amenable number.

1125213533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125213533 is an equidigital number, since it uses as much as digits as its factorization.

1125213533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 26.

The square root of 1125213533 is about 33544.2026734874. The cubic root of 1125213533 is about 1040.1077098134.

Adding to 1125213533 its reverse (3353125211), we get a palindrome (4478338744).

The spelling of 1125213533 in words is "one billion, one hundred twenty-five million, two hundred thirteen thousand, five hundred thirty-three".