42197617731 has 16 divisors (see below), whose sum is σ = 59240160000. Its totient is φ = 26644182048.

The previous prime is 42197617729. The next prime is 42197617783. The reversal of 42197617731 is 13771679124.

It is not a de Polignac number, because 42197617731 - 2¹ = 42197617729 is a prime.

It is a super-2 number, since 2×42197617731² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42197617031) 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, 128770 + ... + 317768.

It is an arithmetic number, because the mean of its divisors is an integer number (3702510000).

Almost surely, 2^42197617731 is an apocalyptic number.

42197617731 is a deficient number, since it is larger than the sum of its proper divisors (17042542269).

42197617731 is a wasteful number, since it uses less digits than its factorization.

42197617731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192938.

The product of its digits is 444528, while the sum is 48.

The spelling of 42197617731 in words is "forty-two billion, one hundred ninety-seven million, six hundred seventeen thousand, seven hundred thirty-one".