51110261 has 4 divisors (see below), whose sum is σ = 51512832. Its totient is φ = 50707692.

The previous prime is 51110249. The next prime is 51110287. The reversal of 51110261 is 16201115.

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 not a de Polignac number, because 51110261 - 2¹⁰ = 51109237 is a prime.

It is a super-2 number, since 2×51110261² = 5224517558976242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51110221) 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, 201095 + ... + 201348.

It is an arithmetic number, because the mean of its divisors is an integer number (12878208).

Almost surely, 2^51110261 is an apocalyptic number.

It is an amenable number.

51110261 is a deficient number, since it is larger than the sum of its proper divisors (402571).

51110261 is a wasteful number, since it uses less digits than its factorization.

51110261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402570.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 51110261 is about 7149.1440746428. The cubic root of 51110261 is about 371.1100363082.

Adding to 51110261 its reverse (16201115), we get a palindrome (67311376).

The spelling of 51110261 in words is "fifty-one million, one hundred ten thousand, two hundred sixty-one".