61432231 has 12 divisors (see below), whose sum is σ = 72136008. Its totient is φ = 52159632.

The previous prime is 61432213. The next prime is 61432249. The reversal of 61432231 is 13223416.

It is an interprime number because it is at equal distance from previous prime (61432213) and next prime (61432249).

It is not a de Polignac number, because 61432231 - 2⁵ = 61432199 is a prime.

It is a super-4 number, since 4×61432231⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61432031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 616 + ... + 11101.

It is an arithmetic number, because the mean of its divisors is an integer number (6011334).

Almost surely, 2^61432231 is an apocalyptic number.

61432231 is a deficient number, since it is larger than the sum of its proper divisors (10703777).

61432231 is a wasteful number, since it uses less digits than its factorization.

61432231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11838 (or 11831 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 61432231 is about 7837.8715860876. The cubic root of 61432231 is about 394.5772992460.

Adding to 61432231 its reverse (13223416), we get a palindrome (74655647).

The spelling of 61432231 in words is "sixty-one million, four hundred thirty-two thousand, two hundred thirty-one".