145555922 has 18 divisors (see below), whose sum is σ = 230944293. Its totient is φ = 68793984.

The previous prime is 145555913. The next prime is 145555931. The reversal of 145555922 is 229555541.

It is an interprime number because it is at equal distance from previous prime (145555913) and next prime (145555931).

It can be written as a sum of positive squares in 2 ways, for example, as 143736121 + 1819801 = 11989^2 + 1349^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=8531.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 323954 + ... + 324402.

Almost surely, 2^145555922 is an apocalyptic number.

145555922 is a deficient number, since it is larger than the sum of its proper divisors (85388371).

145555922 is an frugal number, since it uses more digits than its factorization.

145555922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938 (or 470 counting only the distinct ones).

The product of its digits is 90000, while the sum is 38.

The square root of 145555922 is about 12064.6559006049. The cubic root of 145555922 is about 526.0293299051.

The spelling of 145555922 in words is "one hundred forty-five million, five hundred fifty-five thousand, nine hundred twenty-two".