51261051 has 4 divisors (see below), whose sum is σ = 68348072. Its totient is φ = 34174032.

The previous prime is 51261047. The next prime is 51261053. The reversal of 51261051 is 15016215.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51261051 - 2² = 51261047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51261053) 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, 8543506 + ... + 8543511.

It is an arithmetic number, because the mean of its divisors is an integer number (17087018).

Almost surely, 2^51261051 is an apocalyptic number.

51261051 is a deficient number, since it is larger than the sum of its proper divisors (17087021).

51261051 is a wasteful number, since it uses less digits than its factorization.

51261051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17087020.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 51261051 is about 7159.6823253549. The cubic root of 51261051 is about 371.4746385029.

Adding to 51261051 its reverse (15016215), we get a palindrome (66277266).

The spelling of 51261051 in words is "fifty-one million, two hundred sixty-one thousand, fifty-one".