542122551 has 24 divisors (see below), whose sum is σ = 821882880. Its totient is φ = 357047352.

The previous prime is 542122523. The next prime is 542122577. The reversal of 542122551 is 155221245.

It is not a de Polignac number, because 542122551 - 2⁵ = 542122519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542122501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6730 + ... + 33608.

It is an arithmetic number, because the mean of its divisors is an integer number (34245120).

Almost surely, 2^542122551 is an apocalyptic number.

542122551 is a deficient number, since it is larger than the sum of its proper divisors (279760329).

542122551 is an equidigital number, since it uses as much as digits as its factorization.

542122551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26977 (or 26965 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 542122551 is about 23283.5253129761. The cubic root of 542122551 is about 815.3908326577.

Adding to 542122551 its reverse (155221245), we get a palindrome (697343796).

It can be divided in two parts, 5421 and 22551, that added together give a palindrome (27972).

The spelling of 542122551 in words is "five hundred forty-two million, one hundred twenty-two thousand, five hundred fifty-one".