1145173551 has 8 divisors (see below), whose sum is σ = 1530197760. Its totient is φ = 761799192.

The previous prime is 1145173537. The next prime is 1145173553. The reversal of 1145173551 is 1553715411.

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

It is not a de Polignac number, because 1145173551 - 2⁹ = 1145173039 is a prime.

It is a super-2 number, since 2×1145173551² = 2622844923819899202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145173553) 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, 410841 + ... + 413618.

It is an arithmetic number, because the mean of its divisors is an integer number (191274720).

Almost surely, 2^1145173551 is an apocalyptic number.

1145173551 is a deficient number, since it is larger than the sum of its proper divisors (385024209).

1145173551 is an equidigital number, since it uses as much as digits as its factorization.

1145173551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824925.

The product of its digits is 10500, while the sum is 33.

The square root of 1145173551 is about 33840.4129850686. The cubic root of 1145173551 is about 1046.2218109107.

Adding to 1145173551 its reverse (1553715411), we get a palindrome (2698888962).

The spelling of 1145173551 in words is "one billion, one hundred forty-five million, one hundred seventy-three thousand, five hundred fifty-one".