61031107 has 4 divisors (see below), whose sum is σ = 61176496. Its totient is φ = 60885720.

The previous prime is 61031101. The next prime is 61031119. The reversal of 61031107 is 70113016.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61031107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61031101) 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, 72063 + ... + 72904.

It is an arithmetic number, because the mean of its divisors is an integer number (15294124).

Almost surely, 2^61031107 is an apocalyptic number.

61031107 is a deficient number, since it is larger than the sum of its proper divisors (145389).

61031107 is a wasteful number, since it uses less digits than its factorization.

61031107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145388.

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 61031107 is about 7812.2408437016. The cubic root of 61031107 is about 393.7166209380.

The spelling of 61031107 in words is "sixty-one million, thirty-one thousand, one hundred seven".