51018741 has 10 divisors (see below), whose sum is σ = 76213302. Its totient is φ = 34012440.

The previous prime is 51018739. The next prime is 51018749. The reversal of 51018741 is 14781015.

It can be written as a sum of positive squares in only one way, i.e., 39012516 + 12006225 = 6246^2 + 3465^2 .

It is not a de Polignac number, because 51018741 - 2¹ = 51018739 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51018749) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 314850 + ... + 315011.

Almost surely, 2^51018741 is an apocalyptic number.

It is an amenable number.

51018741 is a deficient number, since it is larger than the sum of its proper divisors (25194561).

51018741 is an equidigital number, since it uses as much as digits as its factorization.

51018741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629873 (or 629864 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 51018741 is about 7142.7404404752. The cubic root of 51018741 is about 370.8883959926. Note that the first 3 decimals are identical.

Adding to 51018741 its reverse (14781015), we get a palindrome (65799756).

The spelling of 51018741 in words is "fifty-one million, eighteen thousand, seven hundred forty-one".