51658946 has 4 divisors (see below), whose sum is σ = 77488422. Its totient is φ = 25829472.

The previous prime is 51658921. The next prime is 51658949. The reversal of 51658946 is 64985615.

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., 41667025 + 9991921 = 6455^2 + 3161^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51658897 and 51658906.

It is not an unprimeable number, because it can be changed into a prime (51658949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12914735 + ... + 12914738.

Almost surely, 2^51658946 is an apocalyptic number.

51658946 is a deficient number, since it is larger than the sum of its proper divisors (25829476).

51658946 is a wasteful number, since it uses less digits than its factorization.

51658946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25829475.

The product of its digits is 259200, while the sum is 44.

The square root of 51658946 is about 7187.4158082026. The cubic root of 51658946 is about 372.4333072798.

The spelling of 51658946 in words is "fifty-one million, six hundred fifty-eight thousand, nine hundred forty-six".