47655861 has 32 divisors (see below), whose sum is σ = 71221248. Its totient is φ = 28103040.

The previous prime is 47655847. The next prime is 47655871. The reversal of 47655861 is 16855674.

It is not a de Polignac number, because 47655861 - 2¹⁰ = 47654837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47655871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 347785 + ... + 347921.

It is an arithmetic number, because the mean of its divisors is an integer number (2225664).

Almost surely, 2^47655861 is an apocalyptic number.

It is an amenable number.

47655861 is a deficient number, since it is larger than the sum of its proper divisors (23565387).

47655861 is a wasteful number, since it uses less digits than its factorization.

47655861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361.

The product of its digits is 201600, while the sum is 42.

The square root of 47655861 is about 6903.3224609604. The cubic root of 47655861 is about 362.5535039536.

It can be divided in two parts, 47655 and 861, that added together give a triangular number (48516 = T₃₁₁).

The spelling of 47655861 in words is "forty-seven million, six hundred fifty-five thousand, eight hundred sixty-one".