42155240031 has 6 divisors (see below), whose sum is σ = 60890902280. Its totient is φ = 28103493348.

The previous prime is 42155240003. The next prime is 42155240059. The reversal of 42155240031 is 13004255124.

42155240031 is a `hidden beast` number, since 42 + 1 + 552 + 40 + 0 + 31 = 666.

It is an interprime number because it is at equal distance from previous prime (42155240003) and next prime (42155240059).

It is not a de Polignac number, because 42155240031 - 2⁵ = 42155239999 is a prime.

It is a super-2 number, since 2×42155240031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42155239977 and 42155240004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42155240531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2341957771 + ... + 2341957788.

Almost surely, 2^42155240031 is an apocalyptic number.

42155240031 is a deficient number, since it is larger than the sum of its proper divisors (18735662249).

42155240031 is a wasteful number, since it uses less digits than its factorization.

42155240031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4683915565 (or 4683915562 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 42155240031 its reverse (13004255124), we get a palindrome (55159495155).

The spelling of 42155240031 in words is "forty-two billion, one hundred fifty-five million, two hundred forty thousand, thirty-one".