48431561 has 4 divisors (see below), whose sum is σ = 48456324. Its totient is φ = 48406800.

The previous prime is 48431531. The next prime is 48431569. The reversal of 48431561 is 16513484.

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 46854025 + 1577536 = 6845^2 + 1256^2 .

It is a cyclic number.

It is not a de Polignac number, because 48431561 - 2⁶ = 48431497 is a prime.

It is a super-2 number, since 2×48431561² = 4691232201793442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (48431569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9170 + ... + 13451.

It is an arithmetic number, because the mean of its divisors is an integer number (12114081).

Almost surely, 2^48431561 is an apocalyptic number.

It is an amenable number.

48431561 is a deficient number, since it is larger than the sum of its proper divisors (24763).

48431561 is a wasteful number, since it uses less digits than its factorization.

48431561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24762.

The product of its digits is 11520, while the sum is 32.

The square root of 48431561 is about 6959.2787701025. The cubic root of 48431561 is about 364.5100350177.

The spelling of 48431561 in words is "forty-eight million, four hundred thirty-one thousand, five hundred sixty-one".