145662551 has 4 divisors (see below), whose sum is σ = 145689504. Its totient is φ = 145635600.

The previous prime is 145662547. The next prime is 145662553. The reversal of 145662551 is 155266541.

145662551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155266541 = 37 ⋅4196393.

It is a cyclic number.

It is not a de Polignac number, because 145662551 - 2² = 145662547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145662553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2255 + ... + 17216.

It is an arithmetic number, because the mean of its divisors is an integer number (36422376).

Almost surely, 2^145662551 is an apocalyptic number.

145662551 is a deficient number, since it is larger than the sum of its proper divisors (26953).

145662551 is an equidigital number, since it uses as much as digits as its factorization.

145662551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26952.

The product of its digits is 36000, while the sum is 35.

The square root of 145662551 is about 12069.0741567032. The cubic root of 145662551 is about 526.1577485677.

The spelling of 145662551 in words is "one hundred forty-five million, six hundred sixty-two thousand, five hundred fifty-one".