49101020251 has 2 divisors, whose sum is σ = 49101020252. Its totient is φ = 49101020250.

The previous prime is 49101020093. The next prime is 49101020263. The reversal of 49101020251 is 15202010194.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49101020251 - 2¹⁵ = 49100987483 is a prime.

It is a super-2 number, since 2×49101020251² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (49101020951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24550510125 + 24550510126.

It is an arithmetic number, because the mean of its divisors is an integer number (24550510126).

Almost surely, 2^49101020251 is an apocalyptic number.

49101020251 is a deficient number, since it is larger than the sum of its proper divisors (1).

49101020251 is an equidigital number, since it uses as much as digits as its factorization.

49101020251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 25.

The spelling of 49101020251 in words is "forty-nine billion, one hundred one million, twenty thousand, two hundred fifty-one".