133471144 has 8 divisors (see below), whose sum is σ = 250258410. Its totient is φ = 66735568.

The previous prime is 133471141. The next prime is 133471147. The reversal of 133471144 is 441174331.

It is an interprime number because it is at equal distance from previous prime (133471141) and next prime (133471147).

It can be written as a sum of positive squares in only one way, i.e., 133402500 + 68644 = 11550^2 + 262^2 .

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

It is not an unprimeable number, because it can be changed into a prime (133471141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8341939 + ... + 8341954.

Almost surely, 2^133471144 is an apocalyptic number.

It is an amenable number.

133471144 is a deficient number, since it is larger than the sum of its proper divisors (116787266).

133471144 is a wasteful number, since it uses less digits than its factorization.

133471144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16683899 (or 16683895 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The square root of 133471144 is about 11552.9712195608. The cubic root of 133471144 is about 511.0489036802.

The spelling of 133471144 in words is "one hundred thirty-three million, four hundred seventy-one thousand, one hundred forty-four".