451157997 has 4 divisors (see below), whose sum is σ = 601544000. Its totient is φ = 300771996.

The previous prime is 451157989. The next prime is 451158023. The reversal of 451157997 is 799751154.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 451157997 - 2³ = 451157989 is a prime.

It is a super-3 number, since 3×451157997³ (a number of 27 digits) contains 333 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 (451157977) 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, 75192997 + ... + 75193002.

It is an arithmetic number, because the mean of its divisors is an integer number (150386000).

Almost surely, 2^451157997 is an apocalyptic number.

It is an amenable number.

451157997 is a deficient number, since it is larger than the sum of its proper divisors (150386003).

451157997 is a wasteful number, since it uses less digits than its factorization.

451157997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150386002.

The product of its digits is 396900, while the sum is 48.

The square root of 451157997 is about 21240.4801499401. The cubic root of 451157997 is about 766.9661908630.

The spelling of 451157997 in words is "four hundred fifty-one million, one hundred fifty-seven thousand, nine hundred ninety-seven".