51369998 has 4 divisors (see below), whose sum is σ = 77055000. Its totient is φ = 25684998.

The previous prime is 51369979. The next prime is 51370009. The reversal of 51369998 is 89996315.

51369998 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, and also an emirpimes, since its reverse is a distinct semiprime: 89996315 = 5 ⋅17999263.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 12842498 + ... + 12842501.

It is an arithmetic number, because the mean of its divisors is an integer number (19263750).

Almost surely, 2^51369998 is an apocalyptic number.

51369998 is a deficient number, since it is larger than the sum of its proper divisors (25685002).

51369998 is a wasteful number, since it uses less digits than its factorization.

51369998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25685001.

The product of its digits is 524880, while the sum is 50.

The square root of 51369998 is about 7167.2866553529. The cubic root of 51369998 is about 371.7376218591.

The spelling of 51369998 in words is "fifty-one million, three hundred sixty-nine thousand, nine hundred ninety-eight".