47551561 has 8 divisors (see below), whose sum is σ = 49521600. Its totient is φ = 45603600.

The previous prime is 47551541. The next prime is 47551579. The reversal of 47551561 is 16515574.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47551561 - 2¹⁹ = 47027273 is a prime.

It is a super-2 number, since 2×47551561² = 4522301907073442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47551531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1051 + ... + 9808.

It is an arithmetic number, because the mean of its divisors is an integer number (6190200).

Almost surely, 2^47551561 is an apocalyptic number.

It is an amenable number.

47551561 is a deficient number, since it is larger than the sum of its proper divisors (1970039).

47551561 is a wasteful number, since it uses less digits than its factorization.

47551561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11039.

The product of its digits is 21000, while the sum is 34.

The square root of 47551561 is about 6895.7639895808. The cubic root of 47551561 is about 362.2888149228.

The spelling of 47551561 in words is "forty-seven million, five hundred fifty-one thousand, five hundred sixty-one".