55221120510 has 16 divisors (see below), whose sum is σ = 132530689296. Its totient is φ = 14725632128.

The previous prime is 55221120481. The next prime is 55221120511. The reversal of 55221120510 is 1502112255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55221120511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 920351979 + ... + 920352038.

It is an arithmetic number, because the mean of its divisors is an integer number (8283168081).

Almost surely, 2^55221120510 is an apocalyptic number.

55221120510 is an abundant number, since it is smaller than the sum of its proper divisors (77309568786).

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

55221120510 is a wasteful number, since it uses less digits than its factorization.

55221120510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840704027.

The product of its (nonzero) digits is 1000, while the sum is 24.

Adding to 55221120510 its reverse (1502112255), we get a palindrome (56723232765).

The spelling of 55221120510 in words is "fifty-five billion, two hundred twenty-one million, one hundred twenty thousand, five hundred ten".