51442042155 has 96 divisors (see below), whose sum is σ = 99465988608. Its totient is φ = 22618713600.

The previous prime is 51442042153. The next prime is 51442042159. The reversal of 51442042155 is 55124024415.

It is a happy number.

It is not a de Polignac number, because 51442042155 - 2¹ = 51442042153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51442042151) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2127564 + ... + 2151606.

It is an arithmetic number, because the mean of its divisors is an integer number (1036104048).

Almost surely, 2^51442042155 is an apocalyptic number.

51442042155 is a deficient number, since it is larger than the sum of its proper divisors (48023946453).

51442042155 is a wasteful number, since it uses less digits than its factorization.

51442042155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24177 (or 24170 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 33.

The spelling of 51442042155 in words is "fifty-one billion, four hundred forty-two million, forty-two thousand, one hundred fifty-five".