133251464 has 8 divisors (see below), whose sum is σ = 249846510. Its totient is φ = 66625728.

The previous prime is 133251449. The next prime is 133251523. The reversal of 133251464 is 464152331.

It can be written as a sum of positive squares in only one way, i.e., 87796900 + 45454564 = 9370^2 + 6742^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8328209 + ... + 8328224.

Almost surely, 2^133251464 is an apocalyptic number.

It is an amenable number.

133251464 is a deficient number, since it is larger than the sum of its proper divisors (116595046).

133251464 is a wasteful number, since it uses less digits than its factorization.

133251464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16656439 (or 16656435 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 133251464 is about 11543.4597933202. The cubic root of 133251464 is about 510.7683714501.

The spelling of 133251464 in words is "one hundred thirty-three million, two hundred fifty-one thousand, four hundred sixty-four".