145404215 has 8 divisors (see below), whose sum is σ = 190347408. Its totient is φ = 105748480.

The previous prime is 145404211. The next prime is 145404223. The reversal of 145404215 is 512404541.

145404215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145404215 - 2² = 145404211 is a prime.

It is a super-2 number, since 2×145404215² = 42284771479532450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145404211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1321802 + ... + 1321911.

It is an arithmetic number, because the mean of its divisors is an integer number (23793426).

Almost surely, 2^145404215 is an apocalyptic number.

145404215 is a deficient number, since it is larger than the sum of its proper divisors (44943193).

145404215 is a wasteful number, since it uses less digits than its factorization.

145404215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2643729.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 145404215 is about 12058.3670121621. The cubic root of 145404215 is about 525.8465134054.

Adding to 145404215 its reverse (512404541), we get a palindrome (657808756).

The spelling of 145404215 in words is "one hundred forty-five million, four hundred four thousand, two hundred fifteen".