145617550 has 24 divisors (see below), whose sum is σ = 291684456. Its totient is φ = 53766240.

The previous prime is 145617547. The next prime is 145617559. The reversal of 145617550 is 55716541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145617559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111364 + ... + 112663.

It is an arithmetic number, because the mean of its divisors is an integer number (12153519).

Almost surely, 2^145617550 is an apocalyptic number.

145617550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145617550 is an abundant number, since it is smaller than the sum of its proper divisors (146066906).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145617550 is a wasteful number, since it uses less digits than its factorization.

145617550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224052 (or 224047 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 145617550 is about 12067.2097023297. The cubic root of 145617550 is about 526.1035592481.

The spelling of 145617550 in words is "one hundred forty-five million, six hundred seventeen thousand, five hundred fifty".