51156946 has 4 divisors (see below), whose sum is σ = 76735422. Its totient is φ = 25578472.

The previous prime is 51156923. The next prime is 51156983. The reversal of 51156946 is 64965115.

51156946 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 32364721 + 18792225 = 5689^2 + 4335^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12789235 + ... + 12789238.

Almost surely, 2^51156946 is an apocalyptic number.

51156946 is a deficient number, since it is larger than the sum of its proper divisors (25578476).

51156946 is a wasteful number, since it uses less digits than its factorization.

51156946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25578475.

The product of its digits is 32400, while the sum is 37.

The square root of 51156946 is about 7152.4084055652. The cubic root of 51156946 is about 371.2229947064. Note that the first 3 decimals are identical.

The spelling of 51156946 in words is "fifty-one million, one hundred fifty-six thousand, nine hundred forty-six".