51949207 has 2 divisors, whose sum is σ = 51949208. Its totient is φ = 51949206.

The previous prime is 51949189. The next prime is 51949213. The reversal of 51949207 is 70294915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51949207 - 2²³ = 43560599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51949267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25974603 + 25974604.

It is an arithmetic number, because the mean of its divisors is an integer number (25974604).

Almost surely, 2^51949207 is an apocalyptic number.

51949207 is a deficient number, since it is larger than the sum of its proper divisors (1).

51949207 is an equidigital number, since it uses as much as digits as its factorization.

51949207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 51949207 is about 7207.5798295961. The cubic root of 51949207 is about 373.1295469631.

The spelling of 51949207 in words is "fifty-one million, nine hundred forty-nine thousand, two hundred seven".