145311538 has 8 divisors (see below), whose sum is σ = 218040732. Its totient is φ = 72631296.

The previous prime is 145311533. The next prime is 145311557. The reversal of 145311538 is 835113541.

It can be written as a sum of positive squares in 2 ways, for example, as 83484769 + 61826769 = 9137^2 + 7863^2 .

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

It is a super-2 number, since 2×145311538² = 42230886151850888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145311533) 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, 3595 + ... + 17422.

Almost surely, 2^145311538 is an apocalyptic number.

145311538 is a deficient number, since it is larger than the sum of its proper divisors (72729194).

145311538 is a wasteful number, since it uses less digits than its factorization.

145311538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24476.

The product of its digits is 7200, while the sum is 31.

The square root of 145311538 is about 12054.5235492739. The cubic root of 145311538 is about 525.7347692012.

The spelling of 145311538 in words is "one hundred forty-five million, three hundred eleven thousand, five hundred thirty-eight".