4251540220 has 48 divisors (see below), whose sum is σ = 9115273440. Its totient is φ = 1665121536.

The previous prime is 4251540203. The next prime is 4251540233. The reversal of 4251540220 is 220451524.

It is a congruent number.

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, 550546 + ... + 558214.

It is an arithmetic number, because the mean of its divisors is an integer number (189901530).

Almost surely, 2^4251540220 is an apocalyptic number.

It is an amenable number.

4251540220 is an abundant number, since it is smaller than the sum of its proper divisors (4863733220).

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

4251540220 is a wasteful number, since it uses less digits than its factorization.

4251540220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8254 (or 8252 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 4251540220 is about 65203.8359301046. The cubic root of 4251540220 is about 1620.0015520993.

Adding to 4251540220 its reverse (220451524), we get a palindrome (4471991744).

The spelling of 4251540220 in words is "four billion, two hundred fifty-one million, five hundred forty thousand, two hundred twenty".