61651103 has 2 divisors, whose sum is σ = 61651104. Its totient is φ = 61651102.

The previous prime is 61651099. The next prime is 61651123. The reversal of 61651103 is 30115616.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61651103 - 2² = 61651099 is a prime.

It is a super-2 number, since 2×61651103² = 7601717002233218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61651123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30825551 + 30825552.

It is an arithmetic number, because the mean of its divisors is an integer number (30825552).

Almost surely, 2^61651103 is an apocalyptic number.

61651103 is a deficient number, since it is larger than the sum of its proper divisors (1).

61651103 is an equidigital number, since it uses as much as digits as its factorization.

61651103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 61651103 is about 7851.8216357734. The cubic root of 61651103 is about 395.0453465004.

Adding to 61651103 its reverse (30115616), we get a palindrome (91766719).

The spelling of 61651103 in words is "sixty-one million, six hundred fifty-one thousand, one hundred three".