55515229 has 16 divisors (see below), whose sum is σ = 69580800. Its totient is φ = 43029360.

The previous prime is 55515223. The next prime is 55515233. The reversal of 55515229 is 92251555.

It is a happy number.

It is not a de Polignac number, because 55515229 - 2⁵ = 55515197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55515194 and 55515203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55515223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13512 + ... + 17134.

It is an arithmetic number, because the mean of its divisors is an integer number (4348800).

Almost surely, 2^55515229 is an apocalyptic number.

It is an amenable number.

55515229 is a deficient number, since it is larger than the sum of its proper divisors (14065571).

55515229 is a wasteful number, since it uses less digits than its factorization.

55515229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3840.

The product of its digits is 22500, while the sum is 34.

The square root of 55515229 is about 7450.8542463264. The cubic root of 55515229 is about 381.4790670716.

The spelling of 55515229 in words is "fifty-five million, five hundred fifteen thousand, two hundred twenty-nine".