145311766 has 4 divisors (see below), whose sum is σ = 217967652. Its totient is φ = 72655882.

The previous prime is 145311763. The next prime is 145311781. The reversal of 145311766 is 667113541.

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

It is a super-2 number, since 2×145311766² = 42231018676077512, which contains 22 as substring.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145311763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36327940 + ... + 36327943.

It is an arithmetic number, because the mean of its divisors is an integer number (54491913).

Almost surely, 2^145311766 is an apocalyptic number.

145311766 is a deficient number, since it is larger than the sum of its proper divisors (72655886).

145311766 is an equidigital number, since it uses as much as digits as its factorization.

145311766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72655885.

The product of its digits is 15120, while the sum is 34.

The square root of 145311766 is about 12054.5330063010. The cubic root of 145311766 is about 525.7350441678.

The spelling of 145311766 in words is "one hundred forty-five million, three hundred eleven thousand, seven hundred sixty-six".