47981651 has 4 divisors (see below), whose sum is σ = 48068352. Its totient is φ = 47894952.

The previous prime is 47981641. The next prime is 47981693. The reversal of 47981651 is 15618974.

Added to its reverse (15618974) it gives a square (63600625 = 7975²).

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 47981651 - 2¹⁰ = 47980627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47981599 and 47981608.

It is not an unprimeable number, because it can be changed into a prime (47981641) 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, 42515 + ... + 43628.

It is an arithmetic number, because the mean of its divisors is an integer number (12017088).

Almost surely, 2^47981651 is an apocalyptic number.

47981651 is a deficient number, since it is larger than the sum of its proper divisors (86701).

47981651 is an equidigital number, since it uses as much as digits as its factorization.

47981651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86700.

The product of its digits is 60480, while the sum is 41.

The square root of 47981651 is about 6926.8788786870. The cubic root of 47981651 is about 363.3778038508.

Adding to 47981651 its reverse (15618974), we get a square (63600625 = 7975²).

The spelling of 47981651 in words is "forty-seven million, nine hundred eighty-one thousand, six hundred fifty-one".