52155012 has 72 divisors (see below), whose sum is σ = 152475456. Its totient is φ = 13753152.

The previous prime is 52154987. The next prime is 52155013. The reversal of 52155012 is 21055125.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 52155012.

It is not an unprimeable number, because it can be changed into a prime (52155013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4233 + ... + 11055.

Almost surely, 2^52155012 is an apocalyptic number.

52155012 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52155012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76237728).

52155012 is an abundant number, since it is smaller than the sum of its proper divisors (100320444).

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

52155012 is a wasteful number, since it uses less digits than its factorization.

52155012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6857 (or 6848 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 52155012 is about 7221.8427011394. The cubic root of 52155012 is about 373.6216349446.

The spelling of 52155012 in words is "fifty-two million, one hundred fifty-five thousand, twelve".