51125546 has 4 divisors (see below), whose sum is σ = 76688322. Its totient is φ = 25562772.

The previous prime is 51125539. The next prime is 51125567. The reversal of 51125546 is 64552115.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 47458321 + 3667225 = 6889^2 + 1915^2 .

It is a super-2 number, since 2×51125546² = 5227642907596232, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 12781385 + ... + 12781388.

Almost surely, 2^51125546 is an apocalyptic number.

51125546 is a deficient number, since it is larger than the sum of its proper divisors (25562776).

51125546 is a wasteful number, since it uses less digits than its factorization.

51125546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25562775.

The product of its digits is 6000, while the sum is 29.

The square root of 51125546 is about 7150.2130038202. The cubic root of 51125546 is about 371.1470272595.

The spelling of 51125546 in words is "fifty-one million, one hundred twenty-five thousand, five hundred forty-six".