451251993 has 16 divisors (see below), whose sum is σ = 609860160. Its totient is φ = 296750784.

The previous prime is 451251991. The next prime is 451252003. The reversal of 451251993 is 399152154.

It is not a de Polignac number, because 451251993 - 2¹ = 451251991 is a prime.

It is a super-2 number, since 2×451251993² = 407256722372944098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (451251991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251343 + ... + 253131.

It is an arithmetic number, because the mean of its divisors is an integer number (38116260).

Almost surely, 2^451251993 is an apocalyptic number.

It is an amenable number.

451251993 is a deficient number, since it is larger than the sum of its proper divisors (158608167).

451251993 is a wasteful number, since it uses less digits than its factorization.

451251993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888.

The product of its digits is 48600, while the sum is 39.

The square root of 451251993 is about 21242.6926965486. The cubic root of 451251993 is about 767.0194513974.

The spelling of 451251993 in words is "four hundred fifty-one million, two hundred fifty-one thousand, nine hundred ninety-three".