49561551 has 48 divisors (see below), whose sum is σ = 82860960. Its totient is φ = 29393280.

The previous prime is 49561549. The next prime is 49561571. The reversal of 49561551 is 15516594.

49561551 is a `hidden beast` number, since 49 + 5 + 61 + 551 = 666.

It is not a de Polignac number, because 49561551 - 2¹ = 49561549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49561571) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 91341 + ... + 91881.

It is an arithmetic number, because the mean of its divisors is an integer number (1726270).

Almost surely, 2^49561551 is an apocalyptic number.

49561551 is a deficient number, since it is larger than the sum of its proper divisors (33299409).

49561551 is a wasteful number, since it uses less digits than its factorization.

49561551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598 (or 586 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 49561551 is about 7039.9965198855. The cubic root of 49561551 is about 367.3231468928.

The spelling of 49561551 in words is "forty-nine million, five hundred sixty-one thousand, five hundred fifty-one".