55321051100 has 72 divisors (see below), whose sum is σ = 138243735168. Its totient is φ = 18822398400.

The previous prime is 55321051061. The next prime is 55321051103. The reversal of 55321051100 is 115012355.

It is a happy number.

It is a super-2 number, since 2×55321051100² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55321051103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 209942 + ... + 393341.

Almost surely, 2^55321051100 is an apocalyptic number.

55321051100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55321051100 is an abundant number, since it is smaller than the sum of its proper divisors (82922684068).

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

55321051100 is a wasteful number, since it uses less digits than its factorization.

55321051100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603435 (or 603428 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 23.

Adding to 55321051100 its reverse (115012355), we get a palindrome (55436063455).

The spelling of 55321051100 in words is "fifty-five billion, three hundred twenty-one million, fifty-one thousand, one hundred".