48155581 has 4 divisors (see below), whose sum is σ = 48218652. Its totient is φ = 48092512.

The previous prime is 48155567. The next prime is 48155587. The reversal of 48155581 is 18555184.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8352100 + 39803481 = 2890^2 + 6309^2 .

It is a cyclic number.

It is not a de Polignac number, because 48155581 - 2¹³ = 48147389 is a prime.

It is a super-2 number, since 2×48155581² = 4637919962895122, 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 48155581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (48155587) 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, 30376 + ... + 31921.

It is an arithmetic number, because the mean of its divisors is an integer number (12054663).

Almost surely, 2^48155581 is an apocalyptic number.

It is an amenable number.

48155581 is a deficient number, since it is larger than the sum of its proper divisors (63071).

48155581 is an equidigital number, since it uses as much as digits as its factorization.

48155581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63070.

The product of its digits is 32000, while the sum is 37.

The square root of 48155581 is about 6939.4222381982. The cubic root of 48155581 is about 363.8163470968.

It can be divided in two parts, 481555 and 81, that added together give a square (481636 = 694²).

The spelling of 48155581 in words is "forty-eight million, one hundred fifty-five thousand, five hundred eighty-one".