145637531 has 8 divisors (see below), whose sum is σ = 157454304. Its totient is φ = 133908480.

The previous prime is 145637497. The next prime is 145637533. The reversal of 145637531 is 135736541.

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

It is a cyclic number.

It is not a de Polignac number, because 145637531 - 2²² = 141443227 is a prime.

It is a super-2 number, since 2×145637531² = 42420580871551922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145637491 and 145637500.

It is not an unprimeable number, because it can be changed into a prime (145637533) 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, 18455 + ... + 25136.

It is an arithmetic number, because the mean of its divisors is an integer number (19681788).

Almost surely, 2^145637531 is an apocalyptic number.

145637531 is a deficient number, since it is larger than the sum of its proper divisors (11816773).

145637531 is a wasteful number, since it uses less digits than its factorization.

145637531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43861.

The product of its digits is 37800, while the sum is 35.

The square root of 145637531 is about 12068.0375786621. The cubic root of 145637531 is about 526.1276213534.

The spelling of 145637531 in words is "one hundred forty-five million, six hundred thirty-seven thousand, five hundred thirty-one".