51411869 has 2 divisors, whose sum is σ = 51411870. Its totient is φ = 51411868.

The previous prime is 51411863. The next prime is 51411889. The reversal of 51411869 is 96811415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32376100 + 19035769 = 5690^2 + 4363^2 .

It is a cyclic number.

It is not a de Polignac number, because 51411869 - 2¹² = 51407773 is a prime.

It is a super-2 number, since 2×51411869² = 5286360548146322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51411863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25705934 + 25705935.

It is an arithmetic number, because the mean of its divisors is an integer number (25705935).

Almost surely, 2^51411869 is an apocalyptic number.

It is an amenable number.

51411869 is a deficient number, since it is larger than the sum of its proper divisors (1).

51411869 is an equidigital number, since it uses as much as digits as its factorization.

51411869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 35.

The square root of 51411869 is about 7170.2070402465. The cubic root of 51411869 is about 371.8385938891.

The spelling of 51411869 in words is "fifty-one million, four hundred eleven thousand, eight hundred sixty-nine".