51220552 has 16 divisors (see below), whose sum is σ = 96230700. Its totient is φ = 25559040.

The previous prime is 51220549. The next prime is 51220567. The reversal of 51220552 is 25502215.

It can be written as a sum of positive squares in 2 ways, for example, as 51065316 + 155236 = 7146^2 + 394^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1977 + ... + 10312.

Almost surely, 2^51220552 is an apocalyptic number.

It is an amenable number.

51220552 is a deficient number, since it is larger than the sum of its proper divisors (45010148).

51220552 is a wasteful number, since it uses less digits than its factorization.

51220552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12816 (or 12812 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 51220552 is about 7156.8534985704. The cubic root of 51220552 is about 371.3767843831.

Adding to 51220552 its reverse (25502215), we get a palindrome (76722767).

The spelling of 51220552 in words is "fifty-one million, two hundred twenty thousand, five hundred fifty-two".