2001232451 has 2 divisors, whose sum is σ = 2001232452. Its totient is φ = 2001232450.

The previous prime is 2001232433. The next prime is 2001232463. The reversal of 2001232451 is 1542321002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001232451 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001232421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000616225 + 1000616226.

It is an arithmetic number, because the mean of its divisors is an integer number (1000616226).

Almost surely, 2^2001232451 is an apocalyptic number.

2001232451 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001232451 is an equidigital number, since it uses as much as digits as its factorization.

2001232451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2001232451 is about 44735.1366489474. The cubic root of 2001232451 is about 1260.1797952466.

Adding to 2001232451 its reverse (1542321002), we get a palindrome (3543553453).

The spelling of 2001232451 in words is "two billion, one million, two hundred thirty-two thousand, four hundred fifty-one".