61333231 has 8 divisors (see below), whose sum is σ = 63615600. Its totient is φ = 59062080.

The previous prime is 61333219. The next prime is 61333247. The reversal of 61333231 is 13233316.

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 61333231 - 2⁵ = 61333199 is a prime.

It is a super-2 number, since 2×61333231² = 7523530449798722, 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 (61333201) 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, 9276 + ... + 14446.

It is an arithmetic number, because the mean of its divisors is an integer number (7951950).

Almost surely, 2^61333231 is an apocalyptic number.

61333231 is a deficient number, since it is larger than the sum of its proper divisors (2282369).

61333231 is a wasteful number, since it uses less digits than its factorization.

61333231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5609.

The product of its digits is 972, while the sum is 22.

The square root of 61333231 is about 7831.5535495839. The cubic root of 61333231 is about 394.3652273165.

Adding to 61333231 its reverse (13233316), we get a palindrome (74566547).

The spelling of 61333231 in words is "sixty-one million, three hundred thirty-three thousand, two hundred thirty-one".