145231451 has 2 divisors, whose sum is σ = 145231452. Its totient is φ = 145231450.

The previous prime is 145231441. The next prime is 145231469. The reversal of 145231451 is 154132541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145231451 - 2²² = 141037147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145231451.

It is not a weakly prime, because it can be changed into another prime (145231441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72615725 + 72615726.

It is an arithmetic number, because the mean of its divisors is an integer number (72615726).

Almost surely, 2^145231451 is an apocalyptic number.

145231451 is a deficient number, since it is larger than the sum of its proper divisors (1).

145231451 is an equidigital number, since it uses as much as digits as its factorization.

145231451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 26.

The square root of 145231451 is about 12051.2012264338. The cubic root of 145231451 is about 525.6381669662.

Adding to 145231451 its reverse (154132541), we get a palindrome (299363992).

The spelling of 145231451 in words is "one hundred forty-five million, two hundred thirty-one thousand, four hundred fifty-one".