55631670 has 64 divisors (see below), whose sum is σ = 141281280. Its totient is φ = 13996800.

The previous prime is 55631659. The next prime is 55631759. The reversal of 55631670 is 7613655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37401 + ... + 38859.

It is an arithmetic number, because the mean of its divisors is an integer number (2207520).

Almost surely, 2^55631670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55631670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70640640).

55631670 is an abundant number, since it is smaller than the sum of its proper divisors (85649610).

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

55631670 is a wasteful number, since it uses less digits than its factorization.

55631670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 55631670 is about 7458.6640895002. The cubic root of 55631670 is about 381.7455932406.

The spelling of 55631670 in words is "fifty-five million, six hundred thirty-one thousand, six hundred seventy".