1518230401 has 4 divisors (see below), whose sum is σ = 1518700372. Its totient is φ = 1517760432.

The previous prime is 1518230387. The next prime is 1518230423. The reversal of 1518230401 is 1040328151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1040328151 = 107 ⋅9722693.

It can be written as a sum of positive squares in 2 ways, for example, as 779749776 + 738480625 = 27924^2 + 27175^2 .

It is a cyclic number.

It is not a de Polignac number, because 1518230401 - 2¹¹ = 1518228353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1518230431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230106 + ... + 236611.

It is an arithmetic number, because the mean of its divisors is an integer number (379675093).

Almost surely, 2^1518230401 is an apocalyptic number.

It is an amenable number.

1518230401 is a deficient number, since it is larger than the sum of its proper divisors (469971).

1518230401 is an equidigital number, since it uses as much as digits as its factorization.

1518230401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469970.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1518230401 is about 38964.4761417371. The cubic root of 1518230401 is about 1149.3330476746. Note that the first 3 decimals are identical.

Adding to 1518230401 its reverse (1040328151), we get a palindrome (2558558552).

The spelling of 1518230401 in words is "one billion, five hundred eighteen million, two hundred thirty thousand, four hundred one".