49999551 has 24 divisors (see below), whose sum is σ = 78140160. Its totient is φ = 28354032.

The previous prime is 49999529. The next prime is 49999553. The reversal of 49999551 is 15599994.

It is a happy number.

It is not a de Polignac number, because 49999551 - 2⁷ = 49999423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 49999494 and 49999503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49999553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19210 + ... + 21656.

It is an arithmetic number, because the mean of its divisors is an integer number (3255840).

Almost surely, 2^49999551 is an apocalyptic number.

49999551 is a deficient number, since it is larger than the sum of its proper divisors (28140609).

49999551 is a wasteful number, since it uses less digits than its factorization.

49999551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2603 (or 2596 counting only the distinct ones).

The product of its digits is 656100, while the sum is 51.

The square root of 49999551 is about 7071.0360626997. The cubic root of 49999551 is about 368.4020471073.

The spelling of 49999551 in words is "forty-nine million, nine hundred ninety-nine thousand, five hundred fifty-one".