55249705 has 12 divisors (see below), whose sum is σ = 77124420. Its totient is φ = 37885344.

The previous prime is 55249693. The next prime is 55249709. The reversal of 55249705 is 50794255.

It can be written as a sum of positive squares in 2 ways, for example, as 11861136 + 43388569 = 3444^2 + 6587^2 .

It is not a de Polignac number, because 55249705 - 2⁷ = 55249577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55249709) 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, 112510 + ... + 112999.

It is an arithmetic number, because the mean of its divisors is an integer number (6427035).

Almost surely, 2^55249705 is an apocalyptic number.

It is an amenable number.

55249705 is a deficient number, since it is larger than the sum of its proper divisors (21874715).

55249705 is a wasteful number, since it uses less digits than its factorization.

55249705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225528 (or 225521 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 37.

The square root of 55249705 is about 7433.0145297853. The cubic root of 55249705 is about 380.8699022842.

The spelling of 55249705 in words is "fifty-five million, two hundred forty-nine thousand, seven hundred five".