451215340 has 24 divisors (see below), whose sum is σ = 969590160. Its totient is φ = 176288448.

The previous prime is 451215337. The next prime is 451215361. The reversal of 451215340 is 43512154.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261475 + ... + 263194.

It is an arithmetic number, because the mean of its divisors is an integer number (40399590).

Almost surely, 2^451215340 is an apocalyptic number.

It is an amenable number.

451215340 is an abundant number, since it is smaller than the sum of its proper divisors (518374820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

451215340 is a wasteful number, since it uses less digits than its factorization.

451215340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524721 (or 524719 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 451215340 is about 21241.8299588336. The cubic root of 451215340 is about 766.9986837512.

Adding to 451215340 its reverse (43512154), we get a palindrome (494727494).

The spelling of 451215340 in words is "four hundred fifty-one million, two hundred fifteen thousand, three hundred forty".