61167551 has 2 divisors, whose sum is σ = 61167552. Its totient is φ = 61167550.

The previous prime is 61167541. The next prime is 61167553. The reversal of 61167551 is 15576116.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61167551 - 2²² = 56973247 is a prime.

Together with 61167553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61167553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30583775 + 30583776.

It is an arithmetic number, because the mean of its divisors is an integer number (30583776).

Almost surely, 2^61167551 is an apocalyptic number.

61167551 is a deficient number, since it is larger than the sum of its proper divisors (1).

61167551 is an equidigital number, since it uses as much as digits as its factorization.

61167551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 32.

The square root of 61167551 is about 7820.9686740199. The cubic root of 61167551 is about 394.0098063300.

The spelling of 61167551 in words is "sixty-one million, one hundred sixty-seven thousand, five hundred fifty-one".