55511554 has 16 divisors (see below), whose sum is σ = 95263488. Its totient is φ = 23765472.

The previous prime is 55511543. The next prime is 55511557. The reversal of 55511554 is 45511555.

It is not an unprimeable number, because it can be changed into a prime (55511557) 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, 18679 + ... + 21445.

It is an arithmetic number, because the mean of its divisors is an integer number (5953968).

Almost surely, 2^55511554 is an apocalyptic number.

55511554 is a deficient number, since it is larger than the sum of its proper divisors (39751934).

55511554 is a wasteful number, since it uses less digits than its factorization.

55511554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4209.

The product of its digits is 12500, while the sum is 31.

The square root of 55511554 is about 7450.6076262275. The cubic root of 55511554 is about 381.4706491622.

Subtracting from 55511554 its reverse (45511555), we obtain a palindrome (9999999).

It can be divided in two parts, 55511 and 554, that added together give a palindrome (56065).

The spelling of 55511554 in words is "fifty-five million, five hundred eleven thousand, five hundred fifty-four".