451421031 has 4 divisors (see below), whose sum is σ = 601894712. Its totient is φ = 300947352.

The previous prime is 451421027. The next prime is 451421099. The reversal of 451421031 is 130124154.

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

It is not a de Polignac number, because 451421031 - 2² = 451421027 is a prime.

It is a super-2 number, since 2×451421031² = 407561894458205922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 451420989 and 451421007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451421011) 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, 75236836 + ... + 75236841.

It is an arithmetic number, because the mean of its divisors is an integer number (150473678).

Almost surely, 2^451421031 is an apocalyptic number.

451421031 is a deficient number, since it is larger than the sum of its proper divisors (150473681).

451421031 is a wasteful number, since it uses less digits than its factorization.

451421031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150473680.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 451421031 is about 21246.6710568974. The cubic root of 451421031 is about 767.1152140384.

Adding to 451421031 its reverse (130124154), we get a palindrome (581545185).

The spelling of 451421031 in words is "four hundred fifty-one million, four hundred twenty-one thousand, thirty-one".