451554431 has 4 divisors (see below), whose sum is σ = 453271632. Its totient is φ = 449837232.

The previous prime is 451554419. The next prime is 451554449. The reversal of 451554431 is 134455154.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-451554431 is a prime.

It is a super-2 number, since 2×451554431² = 407802808311467522, which 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 (451554461) 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, 858206 + ... + 858731.

It is an arithmetic number, because the mean of its divisors is an integer number (113317908).

Almost surely, 2^451554431 is an apocalyptic number.

451554431 is a deficient number, since it is larger than the sum of its proper divisors (1717201).

451554431 is a wasteful number, since it uses less digits than its factorization.

451554431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717200.

The product of its digits is 24000, while the sum is 32.

The square root of 451554431 is about 21249.8101403283. The cubic root of 451554431 is about 767.1907703255.

The spelling of 451554431 in words is "four hundred fifty-one million, five hundred fifty-four thousand, four hundred thirty-one".