51450552 has 40 divisors (see below), whose sum is σ = 144111000. Its totient is φ = 17149968.

The previous prime is 51450533. The next prime is 51450557. The reversal of 51450552 is 25505415.

It is a super-2 number, since 2×51450552² = 5294318602209408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51450557) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 39052 + ... + 40347.

It is an arithmetic number, because the mean of its divisors is an integer number (3602775).

Almost surely, 2^51450552 is an apocalyptic number.

It is an amenable number.

51450552 is an abundant number, since it is smaller than the sum of its proper divisors (92660448).

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

51450552 is a wasteful number, since it uses less digits than its factorization.

51450552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79417 (or 79404 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 51450552 is about 7172.9040144142. The cubic root of 51450552 is about 371.9318293396.

Adding to 51450552 its reverse (25505415), we get a palindrome (76955967).

The spelling of 51450552 in words is "fifty-one million, four hundred fifty thousand, five hundred fifty-two".