1145115553 has 8 divisors (see below), whose sum is σ = 1179567272. Its totient is φ = 1110848256.

The previous prime is 1145115551. The next prime is 1145115571. The reversal of 1145115553 is 3555115411.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 142253329 + 1002862224 = 11927^2 + 31668^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1145115553 - 2¹ = 1145115551 is a prime.

It is a super-2 number, since 2×1145115553² = 2622579259444991618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145115551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33450 + ... + 58387.

It is an arithmetic number, because the mean of its divisors is an integer number (147445909).

Almost surely, 2^1145115553 is an apocalyptic number.

It is an amenable number.

1145115553 is a deficient number, since it is larger than the sum of its proper divisors (34451719).

1145115553 is an equidigital number, since it uses as much as digits as its factorization.

1145115553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92211.

The product of its digits is 7500, while the sum is 31.

The square root of 1145115553 is about 33839.5560402320. The cubic root of 1145115553 is about 1046.2041484359.

The spelling of 1145115553 in words is "one billion, one hundred forty-five million, one hundred fifteen thousand, five hundred fifty-three".