51905001 has 8 divisors (see below), whose sum is σ = 69293664. Its totient is φ = 34559840.

The previous prime is 51904949. The next prime is 51905033. The reversal of 51905001 is 10050915.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51905001 - 2¹⁷ = 51773929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51905201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7980 + ... + 12941.

It is an arithmetic number, because the mean of its divisors is an integer number (8661708).

Almost surely, 2^51905001 is an apocalyptic number.

It is an amenable number.

51905001 is a deficient number, since it is larger than the sum of its proper divisors (17388663).

51905001 is a wasteful number, since it uses less digits than its factorization.

51905001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21751.

The product of its (nonzero) digits is 225, while the sum is 21.

The square root of 51905001 is about 7204.5125442323. The cubic root of 51905001 is about 373.0236791576.

Adding to 51905001 its reverse (10050915), we get a palindrome (61955916).

The spelling of 51905001 in words is "fifty-one million, nine hundred five thousand, one".