1534221540 has 48 divisors (see below), whose sum is σ = 4773135360. Its totient is φ = 409125600.

The previous prime is 1534221529. The next prime is 1534221569. The reversal of 1534221540 is 451224351.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1420036 + ... + 1421115.

It is an arithmetic number, because the mean of its divisors is an integer number (99440320).

Almost surely, 2^1534221540 is an apocalyptic number.

1534221540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1534221540 is an abundant number, since it is smaller than the sum of its proper divisors (3238913820).

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

1534221540 is a wasteful number, since it uses less digits than its factorization.

1534221540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2841169 (or 2841161 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1534221540 is about 39169.1401488468. The cubic root of 1534221540 is about 1153.3541746896.

Adding to 1534221540 its reverse (451224351), we get a palindrome (1985445891).

The spelling of 1534221540 in words is "one billion, five hundred thirty-four million, two hundred twenty-one thousand, five hundred forty".