61551323 has 2 divisors, whose sum is σ = 61551324. Its totient is φ = 61551322.

The previous prime is 61551283. The next prime is 61551401. The reversal of 61551323 is 32315516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61551323 - 2¹⁰ = 61550299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61551292 and 61551301.

It is not a weakly prime, because it can be changed into another prime (61551923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30775661 + 30775662.

It is an arithmetic number, because the mean of its divisors is an integer number (30775662).

Almost surely, 2^61551323 is an apocalyptic number.

61551323 is a deficient number, since it is larger than the sum of its proper divisors (1).

61551323 is an equidigital number, since it uses as much as digits as its factorization.

61551323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 26.

The square root of 61551323 is about 7845.4651232416. The cubic root of 61551323 is about 394.8321093902.

Adding to 61551323 its reverse (32315516), we get a palindrome (93866839).

The spelling of 61551323 in words is "sixty-one million, five hundred fifty-one thousand, three hundred twenty-three".