51574739 has 4 divisors (see below), whose sum is σ = 51751056. Its totient is φ = 51398424.

The previous prime is 51574709. The next prime is 51574799. The reversal of 51574739 is 93747515.

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

It is a cyclic number.

It is not a de Polignac number, because 51574739 - 2¹⁶ = 51509203 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51574696 and 51574705.

It is not an unprimeable number, because it can be changed into a prime (51574709) 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, 87719 + ... + 88304.

It is an arithmetic number, because the mean of its divisors is an integer number (12937764).

Almost surely, 2^51574739 is an apocalyptic number.

51574739 is a deficient number, since it is larger than the sum of its proper divisors (176317).

51574739 is a wasteful number, since it uses less digits than its factorization.

51574739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176316.

The product of its digits is 132300, while the sum is 41.

The square root of 51574739 is about 7181.5554721801. Note that the first 3 decimals coincide. The cubic root of 51574739 is about 372.2308347834.

The spelling of 51574739 in words is "fifty-one million, five hundred seventy-four thousand, seven hundred thirty-nine".