61331567 has 4 divisors (see below), whose sum is σ = 66907176. Its totient is φ = 55755960.

The previous prime is 61331551. The next prime is 61331573. The reversal of 61331567 is 76513316.

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

It is a cyclic number.

It is not a de Polignac number, because 61331567 - 2⁴ = 61331551 is a prime.

It is a super-2 number, since 2×61331567² = 7523122221350978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61331507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2787788 + ... + 2787809.

It is an arithmetic number, because the mean of its divisors is an integer number (16726794).

Almost surely, 2^61331567 is an apocalyptic number.

61331567 is a deficient number, since it is larger than the sum of its proper divisors (5575609).

61331567 is a wasteful number, since it uses less digits than its factorization.

61331567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5575608.

The product of its digits is 11340, while the sum is 32.

The square root of 61331567 is about 7831.4473119596. The cubic root of 61331567 is about 394.3616608450.

The spelling of 61331567 in words is "sixty-one million, three hundred thirty-one thousand, five hundred sixty-seven".