51147694 has 16 divisors (see below), whose sum is σ = 82987632. Its totient is φ = 23502528.

The previous prime is 51147661. The next prime is 51147697. The reversal of 51147694 is 49674115.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51147697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1837 + ... + 10279.

It is an arithmetic number, because the mean of its divisors is an integer number (5186727).

Almost surely, 2^51147694 is an apocalyptic number.

51147694 is a deficient number, since it is larger than the sum of its proper divisors (31839938).

51147694 is a wasteful number, since it uses less digits than its factorization.

51147694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8691.

The product of its digits is 30240, while the sum is 37.

The square root of 51147694 is about 7151.7616011721. The cubic root of 51147694 is about 371.2006141535.

It can be divided in two parts, 511 and 47694, that added together give a triangular number (48205 = T₃₁₀).

The spelling of 51147694 in words is "fifty-one million, one hundred forty-seven thousand, six hundred ninety-four".