145368631 has 4 divisors (see below), whose sum is σ = 145417432. Its totient is φ = 145319832.

The previous prime is 145368617. The next prime is 145368637. The reversal of 145368631 is 136863541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145368631 - 2⁵ = 145368599 is a prime.

It is a super-2 number, since 2×145368631² = 42264077757628322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145368637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19620 + ... + 25993.

It is an arithmetic number, because the mean of its divisors is an integer number (36354358).

Almost surely, 2^145368631 is an apocalyptic number.

145368631 is a deficient number, since it is larger than the sum of its proper divisors (48801).

145368631 is an equidigital number, since it uses as much as digits as its factorization.

145368631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48800.

The product of its digits is 51840, while the sum is 37.

The square root of 145368631 is about 12056.8914318741. The cubic root of 145368631 is about 525.8036140325.

The spelling of 145368631 in words is "one hundred forty-five million, three hundred sixty-eight thousand, six hundred thirty-one".