542157906 has 16 divisors (see below), whose sum is σ = 1086896448. Its totient is φ = 180289200.

The previous prime is 542157899. The next prime is 542157919. The reversal of 542157906 is 609751245.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104790 + ... + 109841.

It is an arithmetic number, because the mean of its divisors is an integer number (67931028).

Almost surely, 2^542157906 is an apocalyptic number.

542157906 is an abundant number, since it is smaller than the sum of its proper divisors (544738542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

542157906 is a wasteful number, since it uses less digits than its factorization.

542157906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215057.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 542157906 is about 23284.2845284110. The cubic root of 542157906 is about 815.4085577497.

The spelling of 542157906 in words is "five hundred forty-two million, one hundred fifty-seven thousand, nine hundred six".