61201081 has 2 divisors, whose sum is σ = 61201082. Its totient is φ = 61201080.

The previous prime is 61201073. The next prime is 61201087. The reversal of 61201081 is 18010216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38007225 + 23193856 = 6165^2 + 4816^2 .

It is a cyclic number.

It is not a de Polignac number, because 61201081 - 2³ = 61201073 is a prime.

It is a super-2 number, since 2×61201081² = 7491144631137122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61201087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30600540 + 30600541.

It is an arithmetic number, because the mean of its divisors is an integer number (30600541).

Almost surely, 2^61201081 is an apocalyptic number.

It is an amenable number.

61201081 is a deficient number, since it is larger than the sum of its proper divisors (1).

61201081 is an equidigital number, since it uses as much as digits as its factorization.

61201081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 61201081 is about 7823.1119767008. Note that the first 3 decimals coincide. The cubic root of 61201081 is about 394.0817874995.

Adding to 61201081 its reverse (18010216), we get a palindrome (79211297).

The spelling of 61201081 in words is "sixty-one million, two hundred one thousand, eighty-one".