61031316 has 24 divisors (see below), whose sum is σ = 144414144. Its totient is φ = 20056960.

The previous prime is 61031291. The next prime is 61031353. The reversal of 61031316 is 61313016.

It is a junction number, because it is equal to n+sod(n) for n = 61031292 and 61031301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34965 + ... + 36668.

It is an arithmetic number, because the mean of its divisors is an integer number (6017256).

Almost surely, 2^61031316 is an apocalyptic number.

It is an amenable number.

61031316 is an abundant number, since it is smaller than the sum of its proper divisors (83382828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61031316 is a wasteful number, since it uses less digits than its factorization.

61031316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71711 (or 71709 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 61031316 is about 7812.2542201339. The cubic root of 61031316 is about 393.7170703628.

The spelling of 61031316 in words is "sixty-one million, thirty-one thousand, three hundred sixteen".