51031001 has 6 divisors (see below), whose sum is σ = 59362650. Its totient is φ = 43740816.

The previous prime is 51030971. The next prime is 51031007. The reversal of 51031001 is 10013015.

It can be written as a sum of positive squares in only one way, i.e., 45630025 + 5400976 = 6755^2 + 2324^2 .

It is not a de Polignac number, because 51031001 - 2¹⁸ = 50768857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51031007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 520676 + ... + 520773.

It is an arithmetic number, because the mean of its divisors is an integer number (9893775).

Almost surely, 2^51031001 is an apocalyptic number.

It is an amenable number.

51031001 is a deficient number, since it is larger than the sum of its proper divisors (8331649).

51031001 is a wasteful number, since it uses less digits than its factorization.

51031001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041463 (or 1041456 counting only the distinct ones).

The product of its (nonzero) digits is 15, while the sum is 11.

The square root of 51031001 is about 7143.5986029452. The cubic root of 51031001 is about 370.9181022500.

Adding to 51031001 its reverse (10013015), we get a palindrome (61044016).

The spelling of 51031001 in words is "fifty-one million, thirty-one thousand, one".