51125461 has 2 divisors, whose sum is σ = 51125462. Its totient is φ = 51125460.

The previous prime is 51125419. The next prime is 51125497. The reversal of 51125461 is 16452115.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28143025 + 22982436 = 5305^2 + 4794^2 .

It is a cyclic number.

It is not a de Polignac number, because 51125461 - 2⁹ = 51124949 is a prime.

It is a super-2 number, since 2×51125461² = 5227625524925042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51125861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25562730 + 25562731.

It is an arithmetic number, because the mean of its divisors is an integer number (25562731).

Almost surely, 2^51125461 is an apocalyptic number.

It is an amenable number.

51125461 is a deficient number, since it is larger than the sum of its proper divisors (1).

51125461 is an equidigital number, since it uses as much as digits as its factorization.

51125461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 25.

The square root of 51125461 is about 7150.2070599389. The cubic root of 51125461 is about 371.1468215730.

Adding to 51125461 its reverse (16452115), we get a palindrome (67577576).

The spelling of 51125461 in words is "fifty-one million, one hundred twenty-five thousand, four hundred sixty-one".