145311451 has 4 divisors (see below), whose sum is σ = 148403232. Its totient is φ = 142219672.

The previous prime is 145311443. The next prime is 145311479. The reversal of 145311451 is 154113541.

145311451 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: 154113541 = 19 ⋅8111239.

It is a cyclic number.

It is not a de Polignac number, because 145311451 - 2³ = 145311443 is a prime.

It is a super-2 number, since 2×145311451² = 42230835583450802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145311151) 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, 1545820 + ... + 1545913.

It is an arithmetic number, because the mean of its divisors is an integer number (37100808).

Almost surely, 2^145311451 is an apocalyptic number.

145311451 is a deficient number, since it is larger than the sum of its proper divisors (3091781).

145311451 is an equidigital number, since it uses as much as digits as its factorization.

145311451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3091780.

The product of its digits is 1200, while the sum is 25.

The square root of 145311451 is about 12054.5199406696. The cubic root of 145311451 is about 525.7346642796.

Adding to 145311451 its reverse (154113541), we get a palindrome (299424992).

The spelling of 145311451 in words is "one hundred forty-five million, three hundred eleven thousand, four hundred fifty-one".