51214069 has 2 divisors, whose sum is σ = 51214070. Its totient is φ = 51214068.

The previous prime is 51214061. The next prime is 51214091. The reversal of 51214069 is 96041215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34363044 + 16851025 = 5862^2 + 4105^2 .

It is a cyclic number.

It is not a de Polignac number, because 51214069 - 2³ = 51214061 is a prime.

It is a super-2 number, since 2×51214069² = 5245761727073522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51214061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25607034 + 25607035.

It is an arithmetic number, because the mean of its divisors is an integer number (25607035).

Almost surely, 2^51214069 is an apocalyptic number.

It is an amenable number.

51214069 is a deficient number, since it is larger than the sum of its proper divisors (1).

51214069 is an equidigital number, since it uses as much as digits as its factorization.

51214069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 51214069 is about 7156.4005617349. The cubic root of 51214069 is about 371.3611152999.

The spelling of 51214069 in words is "fifty-one million, two hundred fourteen thousand, sixty-nine".