542215031 has 4 divisors (see below), whose sum is σ = 551103864. Its totient is φ = 533326200.

The previous prime is 542215021. The next prime is 542215039. The reversal of 542215031 is 130512245.

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 542215031 - 2²⁶ = 475106167 is a prime.

It is a super-2 number, since 2×542215031² = 587994279684661922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 542214988 and 542215006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542215039) 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, 4444325 + ... + 4444446.

It is an arithmetic number, because the mean of its divisors is an integer number (137775966).

Almost surely, 2^542215031 is an apocalyptic number.

542215031 is a deficient number, since it is larger than the sum of its proper divisors (8888833).

542215031 is an equidigital number, since it uses as much as digits as its factorization.

542215031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8888832.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 542215031 is about 23285.5111818487. The cubic root of 542215031 is about 815.4371955182.

Adding to 542215031 its reverse (130512245), we get a palindrome (672727276).

The spelling of 542215031 in words is "five hundred forty-two million, two hundred fifteen thousand, thirty-one".