145621211 has 8 divisors (see below), whose sum is σ = 152076960. Its totient is φ = 139175872.

The previous prime is 145621183. The next prime is 145621237. The reversal of 145621211 is 112126541.

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 145621211 - 2¹⁴ = 145604827 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145624211) 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, 43775 + ... + 46983.

It is an arithmetic number, because the mean of its divisors is an integer number (19009620).

Almost surely, 2^145621211 is an apocalyptic number.

145621211 is a deficient number, since it is larger than the sum of its proper divisors (6455749).

145621211 is a wasteful number, since it uses less digits than its factorization.

145621211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5205.

The product of its digits is 480, while the sum is 23.

The square root of 145621211 is about 12067.3613934447. The cubic root of 145621211 is about 526.1079681695.

Adding to 145621211 its reverse (112126541), we get a palindrome (257747752).

The spelling of 145621211 in words is "one hundred forty-five million, six hundred twenty-one thousand, two hundred eleven".