1545542220 has 48 divisors (see below), whose sum is σ = 4338377568. Its totient is φ = 411110400.

The previous prime is 1545542209. The next prime is 1545542291. The reversal of 1545542220 is 222455451.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8059 + ... + 56178.

It is an arithmetic number, because the mean of its divisors is an integer number (90382866).

Almost surely, 2^1545542220 is an apocalyptic number.

1545542220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1545542220 is an abundant number, since it is smaller than the sum of its proper divisors (2792835348).

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

1545542220 is a wasteful number, since it uses less digits than its factorization.

1545542220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64650 (or 64648 counting only the distinct ones).

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

The square root of 1545542220 is about 39313.3847436214. The cubic root of 1545542220 is about 1156.1840072586.

Adding to 1545542220 its reverse (222455451), we get a palindrome (1767997671).

It can be divided in two parts, 15455 and 42220, that added together give a palindrome (57675).

The spelling of 1545542220 in words is "one billion, five hundred forty-five million, five hundred forty-two thousand, two hundred twenty".