51138001 has 2 divisors, whose sum is σ = 51138002. Its totient is φ = 51138000.

The previous prime is 51137981. The next prime is 51138007. The reversal of 51138001 is 10083115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26625600 + 24512401 = 5160^2 + 4951^2 .

It is a cyclic number.

It is not a de Polignac number, because 51138001 - 2⁵ = 51137969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51138001.

It is not a weakly prime, because it can be changed into another prime (51138007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25569000 + 25569001.

It is an arithmetic number, because the mean of its divisors is an integer number (25569001).

Almost surely, 2^51138001 is an apocalyptic number.

It is an amenable number.

51138001 is a deficient number, since it is larger than the sum of its proper divisors (1).

51138001 is an equidigital number, since it uses as much as digits as its factorization.

51138001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 51138001 is about 7151.0839038568. The cubic root of 51138001 is about 371.1771639280.

The spelling of 51138001 in words is "fifty-one million, one hundred thirty-eight thousand, one".