61520411 has 2 divisors, whose sum is σ = 61520412. Its totient is φ = 61520410.

The previous prime is 61520383. The next prime is 61520419. The reversal of 61520411 is 11402516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61520411 - 2²² = 57326107 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61520419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30760205 + 30760206.

It is an arithmetic number, because the mean of its divisors is an integer number (30760206).

Almost surely, 2^61520411 is an apocalyptic number.

61520411 is a deficient number, since it is larger than the sum of its proper divisors (1).

61520411 is an equidigital number, since it uses as much as digits as its factorization.

61520411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 61520411 is about 7843.4948205503. The cubic root of 61520411 is about 394.7660014480.

Adding to 61520411 its reverse (11402516), we get a palindrome (72922927).

The spelling of 61520411 in words is "sixty-one million, five hundred twenty thousand, four hundred eleven".