51297479 has 4 divisors (see below), whose sum is σ = 51348840. Its totient is φ = 51246120.

The previous prime is 51297469. The next prime is 51297487. The reversal of 51297479 is 97479215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51297479 - 2¹² = 51293383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51297469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24152 + ... + 26189.

It is an arithmetic number, because the mean of its divisors is an integer number (12837210).

Almost surely, 2^51297479 is an apocalyptic number.

51297479 is a deficient number, since it is larger than the sum of its proper divisors (51361).

51297479 is a wasteful number, since it uses less digits than its factorization.

51297479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51360.

The product of its digits is 158760, while the sum is 44.

The square root of 51297479 is about 7162.2258411754. The cubic root of 51297479 is about 371.5626122092.

The spelling of 51297479 in words is "fifty-one million, two hundred ninety-seven thousand, four hundred seventy-nine".