31697142477 has 256 divisors, whose sum is σ = 61931520000. Its totient is φ = 13891046400.

The previous prime is 31697142461. The next prime is 31697142497. The reversal of 31697142477 is 77424179613.

It is not a de Polignac number, because 31697142477 - 2⁴ = 31697142461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31697142427) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 159282024 + ... + 159282222.

It is an arithmetic number, because the mean of its divisors is an integer number (241920000).

Almost surely, 2^31697142477 is an apocalyptic number.

It is an amenable number.

31697142477 is a deficient number, since it is larger than the sum of its proper divisors (30234377523).

31697142477 is a wasteful number, since it uses less digits than its factorization.

31697142477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352.

The product of its digits is 1778112, while the sum is 51.

The spelling of 31697142477 in words is "thirty-one billion, six hundred ninety-seven million, one hundred forty-two thousand, four hundred seventy-seven".