145631211 has 16 divisors (see below), whose sum is σ = 218661888. Its totient is φ = 85413600.

The previous prime is 145631191. The next prime is 145631263. The reversal of 145631211 is 112136541.

It is a happy number.

It is not a de Polignac number, because 145631211 - 2¹⁴ = 145614827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145631611) 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, 70156 + ... + 72201.

It is an arithmetic number, because the mean of its divisors is an integer number (13666368).

Almost surely, 2^145631211 is an apocalyptic number.

145631211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145631211 is a deficient number, since it is larger than the sum of its proper divisors (73030677).

145631211 is a wasteful number, since it uses less digits than its factorization.

145631211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142402.

The product of its digits is 720, while the sum is 24.

The square root of 145631211 is about 12067.7757271172. The cubic root of 145631211 is about 526.1200107358.

Adding to 145631211 its reverse (112136541), we get a palindrome (257767752).

The spelling of 145631211 in words is "one hundred forty-five million, six hundred thirty-one thousand, two hundred eleven".