2131544550 has 96 divisors (see below), whose sum is σ = 5534645760. Its totient is φ = 541868800.

The previous prime is 2131544479. The next prime is 2131544563. The reversal of 2131544550 is 554451312.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1237690 + ... + 1239410.

It is an arithmetic number, because the mean of its divisors is an integer number (57652560).

Almost surely, 2^2131544550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2131544550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2767322880).

2131544550 is an abundant number, since it is smaller than the sum of its proper divisors (3403101210).

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

2131544550 is a wasteful number, since it uses less digits than its factorization.

2131544550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118 (or 2113 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 2131544550 is about 46168.6533266891. The cubic root of 2131544550 is about 1286.9592765052.

Adding to 2131544550 its reverse (554451312), we get a palindrome (2685995862).

The spelling of 2131544550 in words is "two billion, one hundred thirty-one million, five hundred forty-four thousand, five hundred fifty".