55707144 has 32 divisors (see below), whose sum is σ = 144072000. Its totient is φ = 17928512.

The previous prime is 55707143. The next prime is 55707149. The reversal of 55707144 is 44170755.

It is not an unprimeable number, because it can be changed into a prime (55707143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39324 + ... + 40715.

It is an arithmetic number, because the mean of its divisors is an integer number (4502250).

Almost surely, 2^55707144 is an apocalyptic number.

It is an amenable number.

55707144 is an abundant number, since it is smaller than the sum of its proper divisors (88364856).

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

55707144 is a wasteful number, since it uses less digits than its factorization.

55707144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80077 (or 80073 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 33.

The square root of 55707144 is about 7463.7218597694. The cubic root of 55707144 is about 381.9181499114.

Adding to 55707144 its reverse (44170755), we get a palindrome (99877899).

The spelling of 55707144 in words is "fifty-five million, seven hundred seven thousand, one hundred forty-four".