42031061655 has 16 divisors (see below), whose sum is σ = 73363307904. Its totient is φ = 20378696480.

The previous prime is 42031061651. The next prime is 42031061687. The reversal of 42031061655 is 55616013024.

It is not a de Polignac number, because 42031061655 - 2² = 42031061651 is a prime.

It is a super-2 number, since 2×42031061655² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42031061651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127366689 + ... + 127367018.

It is an arithmetic number, because the mean of its divisors is an integer number (4585206744).

Almost surely, 2^42031061655 is an apocalyptic number.

42031061655 is a deficient number, since it is larger than the sum of its proper divisors (31332246249).

42031061655 is a wasteful number, since it uses less digits than its factorization.

42031061655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254733726.

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 42031061655 its reverse (55616013024), we get a palindrome (97647074679).

The spelling of 42031061655 in words is "forty-two billion, thirty-one million, sixty-one thousand, six hundred fifty-five".