55783574 has 32 divisors (see below), whose sum is σ = 104716800. Its totient is φ = 21651840.

The previous prime is 55783573. The next prime is 55783577. The reversal of 55783574 is 47538755.

It is a happy number.

It is a super-2 number, since 2×55783574² = 6223614256426952, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55783571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54782 + ... + 55790.

It is an arithmetic number, because the mean of its divisors is an integer number (3272400).

Almost surely, 2^55783574 is an apocalyptic number.

55783574 is a deficient number, since it is larger than the sum of its proper divisors (48933226).

55783574 is a wasteful number, since it uses less digits than its factorization.

55783574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388.

The product of its digits is 588000, while the sum is 44.

The square root of 55783574 is about 7468.8402044762. The cubic root of 55783574 is about 382.0927335329.

The spelling of 55783574 in words is "fifty-five million, seven hundred eighty-three thousand, five hundred seventy-four".