145431511 has 4 divisors (see below), whose sum is σ = 146790792. Its totient is φ = 144072232.

The previous prime is 145431493. The next prime is 145431527. The reversal of 145431511 is 115134541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 115134541 = 1013 ⋅113657.

It is a cyclic number.

It is not a de Polignac number, because 145431511 - 2⁵ = 145431479 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 (145431211) 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, 679480 + ... + 679693.

It is an arithmetic number, because the mean of its divisors is an integer number (36697698).

Almost surely, 2^145431511 is an apocalyptic number.

145431511 is a deficient number, since it is larger than the sum of its proper divisors (1359281).

145431511 is a wasteful number, since it uses less digits than its factorization.

145431511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359280.

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

The square root of 145431511 is about 12059.4987872631. The cubic root of 145431511 is about 525.8794161847.

The spelling of 145431511 in words is "one hundred forty-five million, four hundred thirty-one thousand, five hundred eleven".