56681310 has 64 divisors (see below), whose sum is σ = 159109632. Its totient is φ = 12652416.

The previous prime is 56681309. The next prime is 56681321. The reversal of 56681310 is 1318665.

It is a super-2 number, since 2×56681310² = 6425541806632200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

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, 5892 + ... + 12168.

It is an arithmetic number, because the mean of its divisors is an integer number (2486088).

Almost surely, 2^56681310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56681310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79554816).

56681310 is an abundant number, since it is smaller than the sum of its proper divisors (102428322).

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

56681310 is a wasteful number, since it uses less digits than its factorization.

56681310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6337.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 56681310 is about 7528.6990908124. The cubic root of 56681310 is about 384.1315331737.

Adding to 56681310 its reverse (1318665), we get a palindrome (57999975).

The spelling of 56681310 in words is "fifty-six million, six hundred eighty-one thousand, three hundred ten".