51454108213 has 2 divisors, whose sum is σ = 51454108214. Its totient is φ = 51454108212.

The previous prime is 51454108193. The next prime is 51454108217. The reversal of 51454108213 is 31280145415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51398784369 + 55323844 = 226713^2 + 7438^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51454108213 is a prime.

It is a super-2 number, since 2×51454108213² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51454108217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25727054106 + 25727054107.

It is an arithmetic number, because the mean of its divisors is an integer number (25727054107).

Almost surely, 2^51454108213 is an apocalyptic number.

It is an amenable number.

51454108213 is a deficient number, since it is larger than the sum of its proper divisors (1).

51454108213 is an equidigital number, since it uses as much as digits as its factorization.

51454108213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 34.

The spelling of 51454108213 in words is "fifty-one billion, four hundred fifty-four million, one hundred eight thousand, two hundred thirteen".