51255152 has 40 divisors (see below), whose sum is σ = 110409600. Its totient is φ = 22890240.

The previous prime is 51255143. The next prime is 51255161. The reversal of 51255152 is 25155215.

It is an interprime number because it is at equal distance from previous prime (51255143) and next prime (51255161).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2474 + ... + 10422.

It is an arithmetic number, because the mean of its divisors is an integer number (2760240).

Almost surely, 2^51255152 is an apocalyptic number.

51255152 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 51255152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55204800).

51255152 is an abundant number, since it is smaller than the sum of its proper divisors (59154448).

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

51255152 is a wasteful number, since it uses less digits than its factorization.

51255152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8001 (or 7995 counting only the distinct ones).

The product of its digits is 2500, while the sum is 26.

The square root of 51255152 is about 7159.2703538838. The cubic root of 51255152 is about 371.4603884832.

The spelling of 51255152 in words is "fifty-one million, two hundred fifty-five thousand, one hundred fifty-two".