1145522553 has 32 divisors (see below), whose sum is σ = 1795691520. Its totient is φ = 635843520.

The previous prime is 1145522531. The next prime is 1145522561. The reversal of 1145522553 is 3552255411.

It is not a de Polignac number, because 1145522553 - 2⁶ = 1145522489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1145522503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 909238 + ... + 910496.

It is an arithmetic number, because the mean of its divisors is an integer number (56115360).

Almost surely, 2^1145522553 is an apocalyptic number.

It is an amenable number.

1145522553 is a deficient number, since it is larger than the sum of its proper divisors (650168967).

1145522553 is a wasteful number, since it uses less digits than its factorization.

1145522553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2477.

The product of its digits is 30000, while the sum is 33.

The square root of 1145522553 is about 33845.5691782543. The cubic root of 1145522553 is about 1046.3280819698.

Adding to 1145522553 its reverse (3552255411), we get a palindrome (4697777964).

The spelling of 1145522553 in words is "one billion, one hundred forty-five million, five hundred twenty-two thousand, five hundred fifty-three".