145903550 has 24 divisors (see below), whose sum is σ = 292257336. Its totient is φ = 53871840.

The previous prime is 145903547. The next prime is 145903573. The reversal of 145903550 is 55309541.

145903550 is nontrivially palindromic in base 6.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111584 + ... + 112883.

It is an arithmetic number, because the mean of its divisors is an integer number (12177389).

Almost surely, 2^145903550 is an apocalyptic number.

145903550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145903550 is an abundant number, since it is smaller than the sum of its proper divisors (146353786).

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

145903550 is a wasteful number, since it uses less digits than its factorization.

145903550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224492 (or 224487 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 32.

The square root of 145903550 is about 12079.0541848276. The cubic root of 145903550 is about 526.4477650530.

The spelling of 145903550 in words is "one hundred forty-five million, nine hundred three thousand, five hundred fifty".