42215550551 has 2 divisors, whose sum is σ = 42215550552. Its totient is φ = 42215550550.

The previous prime is 42215550529. The next prime is 42215550563. The reversal of 42215550551 is 15505551224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42215550551 - 2²² = 42211356247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42215550521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21107775275 + 21107775276.

It is an arithmetic number, because the mean of its divisors is an integer number (21107775276).

Almost surely, 2^42215550551 is an apocalyptic number.

42215550551 is a deficient number, since it is larger than the sum of its proper divisors (1).

42215550551 is an equidigital number, since it uses as much as digits as its factorization.

42215550551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50000, while the sum is 35.

The spelling of 42215550551 in words is "forty-two billion, two hundred fifteen million, five hundred fifty thousand, five hundred fifty-one".