145051855 has 12 divisors (see below), whose sum is σ = 188482680. Its totient is φ = 107114592.

The previous prime is 145051853. The next prime is 145051861. The reversal of 145051855 is 558150541.

145051855 = 1325² + 1326² + ... + 1402².

It is not a de Polignac number, because 145051855 - 2¹ = 145051853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145051855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145051853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84985 + ... + 86674.

It is an arithmetic number, because the mean of its divisors is an integer number (15706890).

Almost surely, 2^145051855 is an apocalyptic number.

145051855 is a deficient number, since it is larger than the sum of its proper divisors (43430825).

145051855 is a wasteful number, since it uses less digits than its factorization.

145051855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171690 (or 171677 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 34.

The square root of 145051855 is about 12043.7475480018. The cubic root of 145051855 is about 525.4214061759.

The spelling of 145051855 in words is "one hundred forty-five million, fifty-one thousand, eight hundred fifty-five".