51509153 has 2 divisors, whose sum is σ = 51509154. Its totient is φ = 51509152.

The previous prime is 51509147. The next prime is 51509203. The reversal of 51509153 is 35190515.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29343889 + 22165264 = 5417^2 + 4708^2 .

It is a cyclic number.

It is not a de Polignac number, because 51509153 - 2⁴ = 51509137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51506153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25754576 + 25754577.

It is an arithmetic number, because the mean of its divisors is an integer number (25754577).

Almost surely, 2^51509153 is an apocalyptic number.

It is an amenable number.

51509153 is a deficient number, since it is larger than the sum of its proper divisors (1).

51509153 is an equidigital number, since it uses as much as digits as its factorization.

51509153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3375, while the sum is 29.

The square root of 51509153 is about 7176.9877385990. The cubic root of 51509153 is about 372.0729830405.

Adding to 51509153 its reverse (35190515), we get a palindrome (86699668).

The spelling of 51509153 in words is "fifty-one million, five hundred nine thousand, one hundred fifty-three".