51751001 has 4 divisors (see below), whose sum is σ = 52523472. Its totient is φ = 50978532.

The previous prime is 51750991. The next prime is 51751019. The reversal of 51751001 is 10015715.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51751001 is a prime.

It is a super-3 number, since 3×51751001³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51751031) 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, 386135 + ... + 386268.

It is an arithmetic number, because the mean of its divisors is an integer number (13130868).

Almost surely, 2^51751001 is an apocalyptic number.

It is an amenable number.

51751001 is a deficient number, since it is larger than the sum of its proper divisors (772471).

51751001 is an equidigital number, since it uses as much as digits as its factorization.

51751001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772470.

The product of its (nonzero) digits is 175, while the sum is 20.

The square root of 51751001 is about 7193.8168589421. The cubic root of 51751001 is about 372.6543984058.

Adding to 51751001 its reverse (10015715), we get a palindrome (61766716).

The spelling of 51751001 in words is "fifty-one million, seven hundred fifty-one thousand, one".