142515551 has 2 divisors, whose sum is σ = 142515552. Its totient is φ = 142515550.

The previous prime is 142515517. The next prime is 142515553. The reversal of 142515551 is 155515241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142515551 - 2¹⁰ = 142514527 is a prime.

Together with 142515553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142515553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71257775 + 71257776.

It is an arithmetic number, because the mean of its divisors is an integer number (71257776).

Almost surely, 2^142515551 is an apocalyptic number.

142515551 is a deficient number, since it is larger than the sum of its proper divisors (1).

142515551 is an equidigital number, since it uses as much as digits as its factorization.

142515551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5000, while the sum is 29.

The square root of 142515551 is about 11937.9877282564. The cubic root of 142515551 is about 522.3409630214.

The spelling of 142515551 in words is "one hundred forty-two million, five hundred fifteen thousand, five hundred fifty-one".