2145540550 has 24 divisors (see below), whose sum is σ = 3991932000. Its totient is φ = 857952480.

The previous prime is 2145540521. The next prime is 2145540557. The reversal of 2145540550 is 550455412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145540557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 288276 + ... + 295624.

It is an arithmetic number, because the mean of its divisors is an integer number (166330500).

Almost surely, 2^2145540550 is an apocalyptic number.

2145540550 is a deficient number, since it is larger than the sum of its proper divisors (1846391450).

2145540550 is a wasteful number, since it uses less digits than its factorization.

2145540550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13200 (or 13195 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 2145540550 is about 46319.9800302202. The cubic root of 2145540550 is about 1289.7699146961.

Adding to 2145540550 its reverse (550455412), we get a palindrome (2695995962).

The spelling of 2145540550 in words is "two billion, one hundred forty-five million, five hundred forty thousand, five hundred fifty".