55181436 has 12 divisors (see below), whose sum is σ = 128756712. Its totient is φ = 18393808.

The previous prime is 55181429. The next prime is 55181479. The reversal of 55181436 is 63418155.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 55181397 and 55181406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2299215 + ... + 2299238.

It is an arithmetic number, because the mean of its divisors is an integer number (10729726).

Almost surely, 2^55181436 is an apocalyptic number.

It is an amenable number.

55181436 is an abundant number, since it is smaller than the sum of its proper divisors (73575276).

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

55181436 is a wasteful number, since it uses less digits than its factorization.

55181436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4598460 (or 4598458 counting only the distinct ones).

The product of its digits is 14400, while the sum is 33.

The square root of 55181436 is about 7428.4208281438. The cubic root of 55181436 is about 380.7129643465.

The spelling of 55181436 in words is "fifty-five million, one hundred eighty-one thousand, four hundred thirty-six".