51213741 has 16 divisors (see below), whose sum is σ = 73669824. Its totient is φ = 31526144.

The previous prime is 51213737. The next prime is 51213761. The reversal of 51213741 is 14731215.

It is a cyclic number.

It is not a de Polignac number, because 51213741 - 2² = 51213737 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51213761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6771 + ... + 12176.

It is an arithmetic number, because the mean of its divisors is an integer number (4604364).

Almost surely, 2^51213741 is an apocalyptic number.

51213741 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

51213741 is a deficient number, since it is larger than the sum of its proper divisors (22456083).

51213741 is a wasteful number, since it uses less digits than its factorization.

51213741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19020.

The product of its digits is 840, while the sum is 24.

The square root of 51213741 is about 7156.3776451498. The cubic root of 51213741 is about 371.3603225053.

Adding to 51213741 its reverse (14731215), we get a palindrome (65944956).

The spelling of 51213741 in words is "fifty-one million, two hundred thirteen thousand, seven hundred forty-one".