61016431 has 8 divisors (see below), whose sum is σ = 70774400. Its totient is φ = 51518808.

The previous prime is 61016419. The next prime is 61016453. The reversal of 61016431 is 13461016.

It is a happy number.

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 61016431 - 2⁵ = 61016399 is a prime.

It is a super-2 number, since 2×61016431² = 7446009703955522, 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 (61016411) 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, 64581 + ... + 65518.

It is an arithmetic number, because the mean of its divisors is an integer number (8846800).

Almost surely, 2^61016431 is an apocalyptic number.

61016431 is a deficient number, since it is larger than the sum of its proper divisors (9757969).

61016431 is a wasteful number, since it uses less digits than its factorization.

61016431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130173.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 61016431 is about 7811.3014920690. The cubic root of 61016431 is about 393.6850597193.

Adding to 61016431 its reverse (13461016), we get a palindrome (74477447).

The spelling of 61016431 in words is "sixty-one million, sixteen thousand, four hundred thirty-one".