51012746 has 4 divisors (see below), whose sum is σ = 76519122. Its totient is φ = 25506372.

The previous prime is 51012697. The next prime is 51012761. The reversal of 51012746 is 64721015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64721015 = 5 ⋅12944203.

It can be written as a sum of positive squares in only one way, i.e., 45900625 + 5112121 = 6775^2 + 2261^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12753185 + ... + 12753188.

Almost surely, 2^51012746 is an apocalyptic number.

51012746 is a deficient number, since it is larger than the sum of its proper divisors (25506376).

51012746 is a wasteful number, since it uses less digits than its factorization.

51012746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25506375.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 51012746 is about 7142.3207712900. The cubic root of 51012746 is about 370.8738682395.

The spelling of 51012746 in words is "fifty-one million, twelve thousand, seven hundred forty-six".