51745801 has 4 divisors (see below), whose sum is σ = 51850000. Its totient is φ = 51641604.

The previous prime is 51745783. The next prime is 51745819. The reversal of 51745801 is 10854715.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10854715 = 5 ⋅2170943.

It is an interprime number because it is at equal distance from previous prime (51745783) and next prime (51745819).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51745801 is a prime.

It is a super-2 number, since 2×51745801² = 5355255842263202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51745201) 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, 51351 + ... + 52348.

It is an arithmetic number, because the mean of its divisors is an integer number (12962500).

Almost surely, 2^51745801 is an apocalyptic number.

It is an amenable number.

51745801 is a deficient number, since it is larger than the sum of its proper divisors (104199).

51745801 is a wasteful number, since it uses less digits than its factorization.

51745801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104198.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 51745801 is about 7193.4554283738. The cubic root of 51745801 is about 372.6419164071.

The spelling of 51745801 in words is "fifty-one million, seven hundred forty-five thousand, eight hundred one".