51351049 has 4 divisors (see below), whose sum is σ = 51503764. Its totient is φ = 51198336.

The previous prime is 51351043. The next prime is 51351077. The reversal of 51351049 is 94015315.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20748025 + 30603024 = 4555^2 + 5532^2 .

It is a cyclic number.

It is not a de Polignac number, because 51351049 - 2⁷ = 51350921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51351043) 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, 75852 + ... + 76525.

It is an arithmetic number, because the mean of its divisors is an integer number (12875941).

Almost surely, 2^51351049 is an apocalyptic number.

It is an amenable number.

51351049 is a deficient number, since it is larger than the sum of its proper divisors (152715).

51351049 is a wasteful number, since it uses less digits than its factorization.

51351049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152714.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 51351049 is about 7165.9646245289. The cubic root of 51351049 is about 371.6919082600.

The spelling of 51351049 in words is "fifty-one million, three hundred fifty-one thousand, forty-nine".