51433378 has 4 divisors (see below), whose sum is σ = 77150070. Its totient is φ = 25716688.

The previous prime is 51433363. The next prime is 51433379. The reversal of 51433378 is 87333415.

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., 43520409 + 7912969 = 6597^2 + 2813^2 .

It is not an unprimeable number, because it can be changed into a prime (51433379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12858343 + ... + 12858346.

Almost surely, 2^51433378 is an apocalyptic number.

51433378 is a deficient number, since it is larger than the sum of its proper divisors (25716692).

51433378 is a wasteful number, since it uses less digits than its factorization.

51433378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25716691.

The product of its digits is 30240, while the sum is 34.

The square root of 51433378 is about 7171.7067703581. The cubic root of 51433378 is about 371.8904415875.

The spelling of 51433378 in words is "fifty-one million, four hundred thirty-three thousand, three hundred seventy-eight".