61031101 has 2 divisors, whose sum is σ = 61031102. Its totient is φ = 61031100.

The previous prime is 61031053. The next prime is 61031119. The reversal of 61031101 is 10113016.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56235001 + 4796100 = 7499^2 + 2190^2 .

It is a cyclic number.

It is not a de Polignac number, because 61031101 - 2⁷ = 61030973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61031801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30515550 + 30515551.

It is an arithmetic number, because the mean of its divisors is an integer number (30515551).

Almost surely, 2^61031101 is an apocalyptic number.

It is an amenable number.

61031101 is a deficient number, since it is larger than the sum of its proper divisors (1).

61031101 is an equidigital number, since it uses as much as digits as its factorization.

61031101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 61031101 is about 7812.2404596889. The cubic root of 61031101 is about 393.7166080358.

Adding to 61031101 its reverse (10113016), we get a palindrome (71144117).

The spelling of 61031101 in words is "sixty-one million, thirty-one thousand, one hundred one".