51978026 has 4 divisors (see below), whose sum is σ = 77967042. Its totient is φ = 25989012.

The previous prime is 51977983. The next prime is 51978127. The reversal of 51978026 is 62087915.

51978026 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 can be written as a sum of positive squares in only one way, i.e., 26988025 + 24990001 = 5195^2 + 4999^2 .

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, 12994505 + ... + 12994508.

Almost surely, 2^51978026 is an apocalyptic number.

51978026 is a deficient number, since it is larger than the sum of its proper divisors (25989016).

51978026 is a wasteful number, since it uses less digits than its factorization.

51978026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25989015.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 51978026 is about 7209.5787671680. The cubic root of 51978026 is about 373.1985325049.

The spelling of 51978026 in words is "fifty-one million, nine hundred seventy-eight thousand, twenty-six".