51994541 has 2 divisors, whose sum is σ = 51994542. Its totient is φ = 51994540.

The previous prime is 51994531. The next prime is 51994567. The reversal of 51994541 is 14549915.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40576900 + 11417641 = 6370^2 + 3379^2 .

It is a cyclic number.

It is not a de Polignac number, because 51994541 - 2²² = 47800237 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 51994495 and 51994504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51994511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25997270 + 25997271.

It is an arithmetic number, because the mean of its divisors is an integer number (25997271).

Almost surely, 2^51994541 is an apocalyptic number.

It is an amenable number.

51994541 is a deficient number, since it is larger than the sum of its proper divisors (1).

51994541 is an equidigital number, since it uses as much as digits as its factorization.

51994541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 38.

The square root of 51994541 is about 7210.7240274469. The cubic root of 51994541 is about 373.2380538282.

Subtracting from 51994541 its sum of digits (38), we obtain a triangular number (51994503 = T₁₀₁₉₇).

The spelling of 51994541 in words is "fifty-one million, nine hundred ninety-four thousand, five hundred forty-one".