145009631 has 16 divisors (see below), whose sum is σ = 160960800. Its totient is φ = 129790080.

The previous prime is 145009591. The next prime is 145009633. The reversal of 145009631 is 136900541.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145009631 is a prime.

It is a super-2 number, since 2×145009631² = 42055586165512322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145009594 and 145009603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145009633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82421 + ... + 84161.

It is an arithmetic number, because the mean of its divisors is an integer number (10060050).

Almost surely, 2^145009631 is an apocalyptic number.

145009631 is a deficient number, since it is larger than the sum of its proper divisors (15951169).

145009631 is a wasteful number, since it uses less digits than its factorization.

145009631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 145009631 is about 12041.9944776603. The cubic root of 145009631 is about 525.3704185561.

The spelling of 145009631 in words is "one hundred forty-five million, nine thousand, six hundred thirty-one".