135251851 has 8 divisors (see below), whose sum is σ = 155216864. Its totient is φ = 115447680.

The previous prime is 135251843. The next prime is 135251923. The reversal of 135251851 is 158152531.

135251851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 135251851 - 2³ = 135251843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135251551) 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, 38400 + ... + 41773.

It is an arithmetic number, because the mean of its divisors is an integer number (19402108).

Almost surely, 2^135251851 is an apocalyptic number.

135251851 is a deficient number, since it is larger than the sum of its proper divisors (19965013).

135251851 is an equidigital number, since it uses as much as digits as its factorization.

135251851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80421.

The product of its digits is 6000, while the sum is 31.

The square root of 135251851 is about 11629.7829300465. The cubic root of 135251851 is about 513.3115926120.

It can be divided in two parts, 1352518 and 51, that added together give a square (1352569 = 1163²).

The spelling of 135251851 in words is "one hundred thirty-five million, two hundred fifty-one thousand, eight hundred fifty-one".