49215204257 has 2 divisors, whose sum is σ = 49215204258. Its totient is φ = 49215204256.

The previous prime is 49215204217. The next prime is 49215204263. The reversal of 49215204257 is 75240251294.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39102689536 + 10112514721 = 197744^2 + 100561^2 .

It is a cyclic number.

It is not a de Polignac number, because 49215204257 - 2¹² = 49215200161 is a prime.

It is not a weakly prime, because it can be changed into another prime (49215204217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24607602128 + 24607602129.

It is an arithmetic number, because the mean of its divisors is an integer number (24607602129).

Almost surely, 2^49215204257 is an apocalyptic number.

It is an amenable number.

49215204257 is a deficient number, since it is larger than the sum of its proper divisors (1).

49215204257 is an equidigital number, since it uses as much as digits as its factorization.

49215204257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 49215204257 in words is "forty-nine billion, two hundred fifteen million, two hundred four thousand, two hundred fifty-seven".