1545220000 has 60 divisors (see below), whose sum is σ = 3801522186. Its totient is φ = 618080000.

The previous prime is 1545219997. The next prime is 1545220003. The reversal of 1545220000 is 225451.

It is an interprime number because it is at equal distance from previous prime (1545219997) and next prime (1545220003).

It can be written as a sum of positive squares in 5 ways, for example, as 92390544 + 1452829456 = 9612^2 + 38116^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1545220000.

It is not an unprimeable number, because it can be changed into a prime (1545220003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 18631 + ... + 58630.

Almost surely, 2^1545220000 is an apocalyptic number.

1545220000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1545220000 is an abundant number, since it is smaller than the sum of its proper divisors (2256302186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1545220000 is an frugal number, since it uses more digits than its factorization.

1545220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77291 (or 77268 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 1545220000 is about 39309.2864346327. The cubic root of 1545220000 is about 1156.1036532575.

Adding to 1545220000 its reverse (225451), we get a palindrome (1545445451).

The spelling of 1545220000 in words is "one billion, five hundred forty-five million, two hundred twenty thousand".