55812156 has 48 divisors (see below), whose sum is σ = 138964896. Its totient is φ = 17373184.

The previous prime is 55812131. The next prime is 55812181. The reversal of 55812156 is 65121855.

It is an interprime number because it is at equal distance from previous prime (55812131) and next prime (55812181).

It is a super-2 number, since 2×55812156² = 6229993514736672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26950 + ... + 28946.

It is an arithmetic number, because the mean of its divisors is an integer number (2895102).

Almost surely, 2^55812156 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 55812156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69482448).

55812156 is an abundant number, since it is smaller than the sum of its proper divisors (83152740).

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

55812156 is a wasteful number, since it uses less digits than its factorization.

55812156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158 (or 2156 counting only the distinct ones).

The product of its digits is 12000, while the sum is 33.

The square root of 55812156 is about 7470.7533756643. The cubic root of 55812156 is about 382.1579803971.

The spelling of 55812156 in words is "fifty-five million, eight hundred twelve thousand, one hundred fifty-six".