51142061 has 2 divisors, whose sum is σ = 51142062. Its totient is φ = 51142060.

The previous prime is 51142031. The next prime is 51142073. The reversal of 51142061 is 16024115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42172036 + 8970025 = 6494^2 + 2995^2 .

It is a cyclic number.

It is not a de Polignac number, because 51142061 - 2⁶ = 51141997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51142031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25571030 + 25571031.

It is an arithmetic number, because the mean of its divisors is an integer number (25571031).

Almost surely, 2^51142061 is an apocalyptic number.

It is an amenable number.

51142061 is a deficient number, since it is larger than the sum of its proper divisors (1).

51142061 is an equidigital number, since it uses as much as digits as its factorization.

51142061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 51142061 is about 7151.3677712728. The cubic root of 51142061 is about 371.1869866259.

Adding to 51142061 its reverse (16024115), we get a palindrome (67166176).

The spelling of 51142061 in words is "fifty-one million, one hundred forty-two thousand, sixty-one".