55191249 has 12 divisors (see below), whose sum is σ = 80168400. Its totient is φ = 36587544.

The previous prime is 55191233. The next prime is 55191251. The reversal of 55191249 is 94219155.

It is not a de Polignac number, because 55191249 - 2⁴ = 55191233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55191259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15519 + ... + 18740.

It is an arithmetic number, because the mean of its divisors is an integer number (6680700).

Almost surely, 2^55191249 is an apocalyptic number.

It is an amenable number.

55191249 is a deficient number, since it is larger than the sum of its proper divisors (24977151).

55191249 is a wasteful number, since it uses less digits than its factorization.

55191249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34444 (or 34441 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The square root of 55191249 is about 7429.0813025569. The cubic root of 55191249 is about 380.7355306004.

The spelling of 55191249 in words is "fifty-five million, one hundred ninety-one thousand, two hundred forty-nine".