61501211 has 2 divisors, whose sum is σ = 61501212. Its totient is φ = 61501210.

The previous prime is 61501177. The next prime is 61501229. The reversal of 61501211 is 11210516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61501211 - 2¹⁴ = 61484827 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61501211.

It is not a weakly prime, because it can be changed into another prime (61501261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30750605 + 30750606.

It is an arithmetic number, because the mean of its divisors is an integer number (30750606).

Almost surely, 2^61501211 is an apocalyptic number.

61501211 is a deficient number, since it is larger than the sum of its proper divisors (1).

61501211 is an equidigital number, since it uses as much as digits as its factorization.

61501211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 61501211 is about 7842.2707808389. The cubic root of 61501211 is about 394.7249294647.

Adding to 61501211 its reverse (11210516), we get a palindrome (72711727).

The spelling of 61501211 in words is "sixty-one million, five hundred one thousand, two hundred eleven".