49251619 has 12 divisors (see below), whose sum is σ = 51235128. Its totient is φ = 47336960.

The previous prime is 49251617. The next prime is 49251623. The reversal of 49251619 is 91615294.

It is not a de Polignac number, because 49251619 - 2¹ = 49251617 is a prime.

It is a super-2 number, since 2×49251619² = 4851443948242322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49251617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139347 + ... + 139699.

It is an arithmetic number, because the mean of its divisors is an integer number (4269594).

Almost surely, 2^49251619 is an apocalyptic number.

49251619 is a deficient number, since it is larger than the sum of its proper divisors (1983509).

49251619 is an equidigital number, since it uses as much as digits as its factorization.

49251619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518 (or 477 counting only the distinct ones).

The product of its digits is 19440, while the sum is 37.

The square root of 49251619 is about 7017.9497718351. The cubic root of 49251619 is about 366.5558630300. Note that the first 3 decimals are identical.

The spelling of 49251619 in words is "forty-nine million, two hundred fifty-one thousand, six hundred nineteen".