542542551 has 4 divisors (see below), whose sum is σ = 723390072. Its totient is φ = 361695032.

The previous prime is 542542523. The next prime is 542542571. The reversal of 542542551 is 155245245.

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 542542551 - 2⁵ = 542542519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542542571) 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, 90423756 + ... + 90423761.

It is an arithmetic number, because the mean of its divisors is an integer number (180847518).

Almost surely, 2^542542551 is an apocalyptic number.

542542551 is a deficient number, since it is larger than the sum of its proper divisors (180847521).

542542551 is a wasteful number, since it uses less digits than its factorization.

542542551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180847520.

The product of its digits is 40000, while the sum is 33.

The square root of 542542551 is about 23292.5428195378. The cubic root of 542542551 is about 815.6013482491.

Adding to 542542551 its reverse (155245245), we get a palindrome (697787796).

The spelling of 542542551 in words is "five hundred forty-two million, five hundred forty-two thousand, five hundred fifty-one".