133551490 has 16 divisors (see below), whose sum is σ = 254533752. Its totient is φ = 50278144.

The previous prime is 133551479. The next prime is 133551493. The reversal of 133551490 is 94155331.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 121154049 + 12397441 = 11007^2 + 3521^2 .

It is not an unprimeable number, because it can be changed into a prime (133551493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392629 + ... + 392968.

Almost surely, 2^133551490 is an apocalyptic number.

133551490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133551490 is a deficient number, since it is larger than the sum of its proper divisors (120982262).

133551490 is a wasteful number, since it uses less digits than its factorization.

133551490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785621.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 133551490 is about 11556.4479837016. The cubic root of 133551490 is about 511.1514289591.

It can be divided in two parts, 1335 and 51490, that added together give a palindrome (52825).

The spelling of 133551490 in words is "one hundred thirty-three million, five hundred fifty-one thousand, four hundred ninety".