47554561 has 4 divisors (see below), whose sum is σ = 47580372. Its totient is φ = 47528752.

The previous prime is 47554543. The next prime is 47554567. The reversal of 47554561 is 16545574.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16545574 = 2 ⋅8272787.

It can be written as a sum of positive squares in 2 ways, for example, as 10112400 + 37442161 = 3180^2 + 6119^2 .

It is a cyclic number.

It is not a de Polignac number, because 47554561 - 2²¹ = 45457409 is a prime.

It is a super-2 number, since 2×47554561² = 4522872543805442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47554561.

It is not an unprimeable number, because it can be changed into a prime (47554567) 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, 9910 + ... + 13903.

It is an arithmetic number, because the mean of its divisors is an integer number (11895093).

It is a Proth number, since it is equal to 5805 ⋅ 2¹³ + 1 and 5805 < 2¹³.

Almost surely, 2^47554561 is an apocalyptic number.

It is an amenable number.

47554561 is a deficient number, since it is larger than the sum of its proper divisors (25811).

47554561 is a wasteful number, since it uses less digits than its factorization.

47554561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25810.

The product of its digits is 84000, while the sum is 37.

The square root of 47554561 is about 6895.9815109961. The cubic root of 47554561 is about 362.2964336253.

It can be divided in two parts, 4755 and 4561, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 47554561 in words is "forty-seven million, five hundred fifty-four thousand, five hundred sixty-one".