122451551 has 2 divisors, whose sum is σ = 122451552. Its totient is φ = 122451550.

The previous prime is 122451541. The next prime is 122451557. The reversal of 122451551 is 155154221.

It is a strong prime.

It is an emirp because it is prime and its reverse (155154221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122451551 - 2¹⁴ = 122435167 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122451551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122451557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61225775 + 61225776.

It is an arithmetic number, because the mean of its divisors is an integer number (61225776).

Almost surely, 2^122451551 is an apocalyptic number.

122451551 is a deficient number, since it is larger than the sum of its proper divisors (1).

122451551 is an equidigital number, since it uses as much as digits as its factorization.

122451551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2000, while the sum is 26.

The square root of 122451551 is about 11065.7828914180. The cubic root of 122451551 is about 496.5787109585.

The spelling of 122451551 in words is "one hundred twenty-two million, four hundred fifty-one thousand, five hundred fifty-one".