145212550 has 24 divisors (see below), whose sum is σ = 308681136. Its totient is φ = 49787040.

The previous prime is 145212523. The next prime is 145212553. The reversal of 145212550 is 55212541.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145212553) 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, 207097 + ... + 207796.

It is an arithmetic number, because the mean of its divisors is an integer number (12861714).

Almost surely, 2^145212550 is an apocalyptic number.

145212550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145212550 is an abundant number, since it is smaller than the sum of its proper divisors (163468586).

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

145212550 is a wasteful number, since it uses less digits than its factorization.

145212550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414912 (or 414907 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 145212550 is about 12050.4170052326. The cubic root of 145212550 is about 525.6153630948.

Subtracting from 145212550 its reverse (55212541), we obtain a palindrome (90000009).

It can be divided in two parts, 14521 and 2550, that added together give a palindrome (17071).

The spelling of 145212550 in words is "one hundred forty-five million, two hundred twelve thousand, five hundred fifty".