55213404 has 24 divisors (see below), whose sum is σ = 130598160. Its totient is φ = 18152064.

The previous prime is 55213397. The next prime is 55213421. The reversal of 55213404 is 40431255.

It is a super-3 number, since 3×55213404³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30639 + ... + 32390.

It is an arithmetic number, because the mean of its divisors is an integer number (5441590).

Almost surely, 2^55213404 is an apocalyptic number.

It is an amenable number.

55213404 is an abundant number, since it is smaller than the sum of its proper divisors (75384756).

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

55213404 is a wasteful number, since it uses less digits than its factorization.

55213404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63109 (or 63107 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 55213404 is about 7430.5722525254. The cubic root of 55213404 is about 380.7864690335.

Adding to 55213404 its reverse (40431255), we get a palindrome (95644659).

The spelling of 55213404 in words is "fifty-five million, two hundred thirteen thousand, four hundred four".