49509951 has 4 divisors (see below), whose sum is σ = 66013272. Its totient is φ = 33006632.

The previous prime is 49509949. The next prime is 49509973. The reversal of 49509951 is 15990594.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 49509951 - 2¹ = 49509949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49509451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8251656 + ... + 8251661.

It is an arithmetic number, because the mean of its divisors is an integer number (16503318).

Almost surely, 2^49509951 is an apocalyptic number.

49509951 is a deficient number, since it is larger than the sum of its proper divisors (16503321).

49509951 is a wasteful number, since it uses less digits than its factorization.

49509951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16503320.

The product of its (nonzero) digits is 72900, while the sum is 42.

The square root of 49509951 is about 7036.3307909734. The cubic root of 49509951 is about 367.1956256213.

The spelling of 49509951 in words is "forty-nine million, five hundred nine thousand, nine hundred fifty-one".