51761494 has 4 divisors (see below), whose sum is σ = 77642244. Its totient is φ = 25880746.

The previous prime is 51761473. The next prime is 51761497. The reversal of 51761494 is 49416715.

51761494 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 is a super-2 number, since 2×51761494² = 5358504522224072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51761497) by changing a digit.

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, 12940372 + ... + 12940375.

It is an arithmetic number, because the mean of its divisors is an integer number (19410561).

Almost surely, 2^51761494 is an apocalyptic number.

51761494 is a deficient number, since it is larger than the sum of its proper divisors (25880750).

51761494 is a wasteful number, since it uses less digits than its factorization.

51761494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25880749.

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

The square root of 51761494 is about 7194.5461288395. The cubic root of 51761494 is about 372.6795830932.

It can be divided in two parts, 5176149 and 4, that added together give a triangular number (5176153 = T₃₂₁₇).

The spelling of 51761494 in words is "fifty-one million, seven hundred sixty-one thousand, four hundred ninety-four".