55731712 has 80 divisors (see below), whose sum is σ = 124478640. Its totient is φ = 24772608.

The previous prime is 55731701. The next prime is 55731719. The reversal of 55731712 is 21713755.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55731719) 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, 165208 + ... + 165544.

It is an arithmetic number, because the mean of its divisors is an integer number (1555983).

Almost surely, 2^55731712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55731712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62239320).

55731712 is an abundant number, since it is smaller than the sum of its proper divisors (68746928).

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

55731712 is a wasteful number, since it uses less digits than its factorization.

55731712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 375 counting only the distinct ones).

The product of its digits is 7350, while the sum is 31.

The square root of 55731712 is about 7465.3675060241. The cubic root of 55731712 is about 381.9742862547.

The spelling of 55731712 in words is "fifty-five million, seven hundred thirty-one thousand, seven hundred twelve".