51397498 has 4 divisors (see below), whose sum is σ = 77096250. Its totient is φ = 25698748.

The previous prime is 51397481. The next prime is 51397517. The reversal of 51397498 is 89479315.

It is a happy number.

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., 30173049 + 21224449 = 5493^2 + 4607^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12849373 + ... + 12849376.

Almost surely, 2^51397498 is an apocalyptic number.

51397498 is a deficient number, since it is larger than the sum of its proper divisors (25698752).

51397498 is a wasteful number, since it uses less digits than its factorization.

51397498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25698751.

The product of its digits is 272160, while the sum is 46.

The square root of 51397498 is about 7169.2048373582. The cubic root of 51397498 is about 371.8039443648.

The spelling of 51397498 in words is "fifty-one million, three hundred ninety-seven thousand, four hundred ninety-eight".