1545222540 has 24 divisors (see below), whose sum is σ = 4326623280. Its totient is φ = 412059328.

The previous prime is 1545222517. The next prime is 1545222607. The reversal of 1545222540 is 452225451.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1545222498 and 1545222507.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12876795 + ... + 12876914.

It is an arithmetic number, because the mean of its divisors is an integer number (180275970).

Almost surely, 2^1545222540 is an apocalyptic number.

1545222540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1545222540 is an abundant number, since it is smaller than the sum of its proper divisors (2781400740).

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

1545222540 is a wasteful number, since it uses less digits than its factorization.

1545222540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25753721 (or 25753719 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 1545222540 is about 39309.3187425068. The cubic root of 1545222540 is about 1156.1042867168.

Adding to 1545222540 its reverse (452225451), we get a palindrome (1997447991).

The spelling of 1545222540 in words is "one billion, five hundred forty-five million, two hundred twenty-two thousand, five hundred forty".