61031128 has 16 divisors (see below), whose sum is σ = 114741000. Its totient is φ = 30433536.

The previous prime is 61031119. The next prime is 61031129. The reversal of 61031128 is 82113016.

It is a junction number, because it is equal to n+sod(n) for n = 61031099 and 61031108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61031129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7033 + ... + 13096.

Almost surely, 2^61031128 is an apocalyptic number.

It is an amenable number.

61031128 is a deficient number, since it is larger than the sum of its proper divisors (53709872).

61031128 is a wasteful number, since it uses less digits than its factorization.

61031128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20514 (or 20510 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 61031128 is about 7812.2421877461. The cubic root of 61031128 is about 393.7166660956.

The spelling of 61031128 in words is "sixty-one million, thirty-one thousand, one hundred twenty-eight".