1151515445 has 4 divisors (see below), whose sum is σ = 1381818540. Its totient is φ = 921212352.

The previous prime is 1151515439. The next prime is 1151515481. The reversal of 1151515445 is 5445151511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5445151511 = 197 ⋅27640363.

It can be written as a sum of positive squares in 2 ways, for example, as 632723716 + 518791729 = 25154^2 + 22777^2 .

It is a cyclic number.

It is not a de Polignac number, because 1151515445 - 2¹² = 1151511349 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115151540 + ... + 115151549.

It is an arithmetic number, because the mean of its divisors is an integer number (345454635).

Almost surely, 2^1151515445 is an apocalyptic number.

It is an amenable number.

1151515445 is a deficient number, since it is larger than the sum of its proper divisors (230303095).

1151515445 is an equidigital number, since it uses as much as digits as its factorization.

1151515445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230303094.

The product of its digits is 10000, while the sum is 32.

The square root of 1151515445 is about 33933.9865768819. The cubic root of 1151515445 is about 1048.1495586748.

Adding to 1151515445 its reverse (5445151511), we get a palindrome (6596666956).

The spelling of 1151515445 in words is "one billion, one hundred fifty-one million, five hundred fifteen thousand, four hundred forty-five".