1540221006 has 64 divisors (see below), whose sum is σ = 3226728960. Its totient is φ = 489730560.

The previous prime is 1540220987. The next prime is 1540221017. The reversal of 1540221006 is 6001220451.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2254741 + ... + 2255423.

It is an arithmetic number, because the mean of its divisors is an integer number (50417640).

Almost surely, 2^1540221006 is an apocalyptic number.

1540221006 is an abundant number, since it is smaller than the sum of its proper divisors (1686507954).

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

1540221006 is a wasteful number, since it uses less digits than its factorization.

1540221006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1540221006 is about 39245.6495168573. The cubic root of 1540221006 is about 1154.8555895986.

Adding to 1540221006 its reverse (6001220451), we get a palindrome (7541441457).

The spelling of 1540221006 in words is "one billion, five hundred forty million, two hundred twenty-one thousand, six".