51550152 has 16 divisors (see below), whose sum is σ = 128875440. Its totient is φ = 17183376.

The previous prime is 51550099. The next prime is 51550159. The reversal of 51550152 is 25105515.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 2147923 = 51550152 / (5 + 1 + 5 + 5 + 0 + 1 + 5 + 2).

It is not an unprimeable number, because it can be changed into a prime (51550159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1073938 + ... + 1073985.

It is an arithmetic number, because the mean of its divisors is an integer number (8054715).

Almost surely, 2^51550152 is an apocalyptic number.

It is an amenable number.

51550152 is an abundant number, since it is smaller than the sum of its proper divisors (77325288).

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

51550152 is a wasteful number, since it uses less digits than its factorization.

51550152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147932 (or 2147928 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 24.

The square root of 51550152 is about 7179.8434523324. The cubic root of 51550152 is about 372.1716747214.

Adding to 51550152 its reverse (25105515), we get a palindrome (76655667).

The spelling of 51550152 in words is "fifty-one million, five hundred fifty thousand, one hundred fifty-two".