51540201 has 6 divisors (see below), whose sum is σ = 74446970. Its totient is φ = 34360128.

The previous prime is 51540193. The next prime is 51540211. The reversal of 51540201 is 10204515.

It can be written as a sum of positive squares in only one way, i.e., 33698025 + 17842176 = 5805^2 + 4224^2 .

It is not a de Polignac number, because 51540201 - 2³ = 51540193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51540211) 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, 2863336 + ... + 2863353.

Almost surely, 2^51540201 is an apocalyptic number.

It is an amenable number.

51540201 is a deficient number, since it is larger than the sum of its proper divisors (22906769).

51540201 is a wasteful number, since it uses less digits than its factorization.

51540201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5726695 (or 5726692 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 51540201 is about 7179.1504372036. The cubic root of 51540201 is about 372.1477257545.

Adding to 51540201 its reverse (10204515), we get a palindrome (61744716).

The spelling of 51540201 in words is "fifty-one million, five hundred forty thousand, two hundred one".