55398249 has 15 divisors (see below), whose sum is σ = 82855597. Its totient is φ = 36887508.

The previous prime is 55398229. The next prime is 55398263. The reversal of 55398249 is 94289355.

The square root of 55398249 is 7443.

It is a perfect power (a square), and thus also a powerful number.

55398249 is a `hidden beast` number, since 553 + 98 + 2 + 4 + 9 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-55398249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55398229) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 66574 + ... + 67400.

Almost surely, 2^55398249 is an apocalyptic number.

55398249 is the 7443-rd square number.

55398249 is the 3722-nd centered octagonal number.

It is an amenable number.

55398249 is a deficient number, since it is larger than the sum of its proper divisors (27457348).

55398249 is an frugal number, since it uses more digits than its factorization.

55398249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666 (or 830 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The cubic root of 55398249 is about 381.2109316233.

The spelling of 55398249 in words is "fifty-five million, three hundred ninety-eight thousand, two hundred forty-nine".