51006552 has 16 divisors (see below), whose sum is σ = 127516440. Its totient is φ = 17002176.

The previous prime is 51006551. The next prime is 51006559. The reversal of 51006552 is 25560015.

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: 2125273 = 51006552 / (5 + 1 + 0 + 0 + 6 + 5 + 5 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51006551) 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, 1062613 + ... + 1062660.

Almost surely, 2^51006552 is an apocalyptic number.

It is an amenable number.

51006552 is an abundant number, since it is smaller than the sum of its proper divisors (76509888).

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

51006552 is a wasteful number, since it uses less digits than its factorization.

51006552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125282 (or 2125278 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 51006552 is about 7141.8871455659. The cubic root of 51006552 is about 370.8588570517.

Adding to 51006552 its reverse (25560015), we get a palindrome (76566567).

The spelling of 51006552 in words is "fifty-one million, six thousand, five hundred fifty-two".