51125650 has 12 divisors (see below), whose sum is σ = 95093802. Its totient is φ = 20450240.

The previous prime is 51125639. The next prime is 51125671. The reversal of 51125650 is 5652115.

It can be written as a sum of positive squares in 3 ways, for example, as 48399849 + 2725801 = 6957^2 + 1651^2 .

It is a super-2 number, since 2×51125650² = 5227664175845000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 511207 + ... + 511306.

Almost surely, 2^51125650 is an apocalyptic number.

51125650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51125650 is a deficient number, since it is larger than the sum of its proper divisors (43968152).

51125650 is a wasteful number, since it uses less digits than its factorization.

51125650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022525 (or 1022520 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 51125650 is about 7150.2202763272. The cubic root of 51125650 is about 371.1472789228.

Adding to 51125650 its reverse (5652115), we get a palindrome (56777765).

The spelling of 51125650 in words is "fifty-one million, one hundred twenty-five thousand, six hundred fifty".