142555551 has 4 divisors (see below), whose sum is σ = 190074072. Its totient is φ = 95037032.

The previous prime is 142555547. The next prime is 142555573. The reversal of 142555551 is 155555241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142555551 - 2² = 142555547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142555051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23759256 + ... + 23759261.

It is an arithmetic number, because the mean of its divisors is an integer number (47518518).

Almost surely, 2^142555551 is an apocalyptic number.

142555551 is a deficient number, since it is larger than the sum of its proper divisors (47518521).

142555551 is an equidigital number, since it uses as much as digits as its factorization.

142555551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47518520.

The product of its digits is 25000, while the sum is 33.

The square root of 142555551 is about 11939.6629349408. The cubic root of 142555551 is about 522.3898271254.

The spelling of 142555551 in words is "one hundred forty-two million, five hundred fifty-five thousand, five hundred fifty-one".