55511532210 has 128 divisors (see below), whose sum is σ = 146719641600. Its totient is φ = 13390548480.

The previous prime is 55511532173. The next prime is 55511532247. The reversal of 55511532210 is 1223511555.

It is an interprime number because it is at equal distance from previous prime (55511532173) and next prime (55511532247).

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1073121 + ... + 1123659.

It is an arithmetic number, because the mean of its divisors is an integer number (1146247200).

Almost surely, 2^55511532210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55511532210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73359820800).

55511532210 is an abundant number, since it is smaller than the sum of its proper divisors (91208109390).

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

55511532210 is a wasteful number, since it uses less digits than its factorization.

55511532210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50656.

The product of its (nonzero) digits is 7500, while the sum is 30.

The spelling of 55511532210 in words is "fifty-five billion, five hundred eleven million, five hundred thirty-two thousand, two hundred ten".