145763531 has 4 divisors (see below), whose sum is σ = 145905672. Its totient is φ = 145621392.

The previous prime is 145763477. The next prime is 145763533. The reversal of 145763531 is 135367541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135367541 = 571 ⋅237071.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145763531 is a prime.

It is a super-2 number, since 2×145763531² = 42494013939175922, 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 = 145763491 and 145763500.

It is not an unprimeable number, because it can be changed into a prime (145763533) 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, 69521 + ... + 71586.

It is an arithmetic number, because the mean of its divisors is an integer number (36476418).

Almost surely, 2^145763531 is an apocalyptic number.

145763531 is a deficient number, since it is larger than the sum of its proper divisors (142141).

145763531 is a wasteful number, since it uses less digits than its factorization.

145763531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142140.

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

The square root of 145763531 is about 12073.2568514051. The cubic root of 145763531 is about 526.2793060902.

The spelling of 145763531 in words is "one hundred forty-five million, seven hundred sixty-three thousand, five hundred thirty-one".