47655981 has 48 divisors (see below), whose sum is σ = 76422528. Its totient is φ = 28492800.

The previous prime is 47655973. The next prime is 47655983. The reversal of 47655981 is 18955674.

It is not a de Polignac number, because 47655981 - 2³ = 47655973 is a prime.

It is a super-2 number, since 2×47655981² = 4542185050144722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47655983) 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, 445330 + ... + 445436.

It is an arithmetic number, because the mean of its divisors is an integer number (1592136).

Almost surely, 2^47655981 is an apocalyptic number.

47655981 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

47655981 is a deficient number, since it is larger than the sum of its proper divisors (28766547).

47655981 is a wasteful number, since it uses less digits than its factorization.

47655981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 239 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 47655981 is about 6903.3311524220. The cubic root of 47655981 is about 362.5538082630.

The spelling of 47655981 in words is "forty-seven million, six hundred fifty-five thousand, nine hundred eighty-one".