55151712 has 192 divisors, whose sum is σ = 200793600. Its totient is φ = 14307840.

The previous prime is 55151669. The next prime is 55151743. The reversal of 55151712 is 21715155.

It is a super-2 number, since 2×55151712² = 6083422673061888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 66114 + ... + 66942.

It is an arithmetic number, because the mean of its divisors is an integer number (1045800).

Almost surely, 2^55151712 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 55151712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100396800).

55151712 is an abundant number, since it is smaller than the sum of its proper divisors (145641888).

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

55151712 is a wasteful number, since it uses less digits than its factorization.

55151712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866 (or 852 counting only the distinct ones).

The product of its digits is 1750, while the sum is 27.

The square root of 55151712 is about 7426.4198642415. The cubic root of 55151712 is about 380.6445938614.

Adding to 55151712 its reverse (21715155), we get a palindrome (76866867).

It can be divided in two parts, 5515 and 1712, that added together give a palindrome (7227).

The spelling of 55151712 in words is "fifty-five million, one hundred fifty-one thousand, seven hundred twelve".