61231316 has 6 divisors (see below), whose sum is σ = 107154810. Its totient is φ = 30615656.

The previous prime is 61231309. The next prime is 61231349. The reversal of 61231316 is 61313216.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 43507216 + 17724100 = 6596^2 + 4210^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61231291 and 61231300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7653911 + ... + 7653918.

It is an arithmetic number, because the mean of its divisors is an integer number (17859135).

Almost surely, 2^61231316 is an apocalyptic number.

It is an amenable number.

61231316 is a deficient number, since it is larger than the sum of its proper divisors (45923494).

61231316 is a wasteful number, since it uses less digits than its factorization.

61231316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15307833 (or 15307831 counting only the distinct ones).

The product of its digits is 648, while the sum is 23.

The square root of 61231316 is about 7825.0441532301. The cubic root of 61231316 is about 394.1466725259.

The spelling of 61231316 in words is "sixty-one million, two hundred thirty-one thousand, three hundred sixteen".