135451531 has 8 divisors (see below), whose sum is σ = 142125984. Its totient is φ = 128842560.

The previous prime is 135451507. The next prime is 135451543. The reversal of 135451531 is 135154531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135451531 - 2⁵ = 135451499 is a prime.

It is a super-2 number, since 2×135451531² = 36694234500487922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135451531.

It is not an unprimeable number, because it can be changed into a prime (135451501) 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, 12106 + ... + 20431.

It is an arithmetic number, because the mean of its divisors is an integer number (17765748).

Almost surely, 2^135451531 is an apocalyptic number.

135451531 is a deficient number, since it is larger than the sum of its proper divisors (6674453).

135451531 is a wasteful number, since it uses less digits than its factorization.

135451531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32741.

The product of its digits is 4500, while the sum is 28.

The square root of 135451531 is about 11638.3646187942. The cubic root of 135451531 is about 513.5640787656.

The spelling of 135451531 in words is "one hundred thirty-five million, four hundred fifty-one thousand, five hundred thirty-one".