2551220532100 has 18 divisors (see below), whose sum is σ = 5536148554874. Its totient is φ = 1020488212800.

The previous prime is 2551220532097. The next prime is 2551220532127. The reversal of 2551220532100 is 12350221552.

It can be written as a sum of positive squares in 3 ways, for example, as 374840266564 + 2176380265536 = 612242^2 + 1475256^2 .

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 5 ways as a sum of consecutive naturals, for example, 12756102561 + ... + 12756102760.

Almost surely, 2^{2551220532100} is an apocalyptic number.

2551220532100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2551220532100 is an abundant number, since it is smaller than the sum of its proper divisors (2984928022774).

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

2551220532100 is a wasteful number, since it uses less digits than its factorization.

2551220532100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25512205335 (or 25512205328 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 2551220532100 its reverse (12350221552), we get a palindrome (2563570753652).

The spelling of 2551220532100 in words is "two trillion, five hundred fifty-one billion, two hundred twenty million, five hundred thirty-two thousand, one hundred".