145214311511 has 4 divisors (see below), whose sum is σ = 145216581000. Its totient is φ = 145212042024.

The previous prime is 145214311507. The next prime is 145214311547. The reversal of 145214311511 is 115113412541.

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 145214311511 - 2² = 145214311507 is a prime.

It is a super-2 number, since 2×145214311511² (a number of 23 digits) 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 (145214311811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1035896 + ... + 1167693.

It is an arithmetic number, because the mean of its divisors is an integer number (36304145250).

Almost surely, 2^145214311511 is an apocalyptic number.

145214311511 is a deficient number, since it is larger than the sum of its proper divisors (2269489).

145214311511 is an equidigital number, since it uses as much as digits as its factorization.

145214311511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2269488.

The product of its digits is 2400, while the sum is 29.

The spelling of 145214311511 in words is "one hundred forty-five billion, two hundred fourteen million, three hundred eleven thousand, five hundred eleven".