51459998 has 4 divisors (see below), whose sum is σ = 77190000. Its totient is φ = 25729998.

The previous prime is 51459997. The next prime is 51460001. The reversal of 51459998 is 89995415.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51459997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12864998 + ... + 12865001.

It is an arithmetic number, because the mean of its divisors is an integer number (19297500).

Almost surely, 2^51459998 is an apocalyptic number.

51459998 is a deficient number, since it is larger than the sum of its proper divisors (25730002).

51459998 is a wasteful number, since it uses less digits than its factorization.

51459998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25730001.

The product of its digits is 583200, while the sum is 50.

The square root of 51459998 is about 7173.5624343836. The cubic root of 51459998 is about 371.9545894004.

The spelling of 51459998 in words is "fifty-one million, four hundred fifty-nine thousand, nine hundred ninety-eight".