31678400151 has 24 divisors (see below), whose sum is σ = 49113024480. Its totient is φ = 19604353536.

The previous prime is 31678400141. The next prime is 31678400179. The reversal of 31678400151 is 15100487613.

31678400151 is a `hidden beast` number, since 31 + 6 + 78 + 400 + 151 = 666.

It is not a de Polignac number, because 31678400151 - 2⁶ = 31678400087 is a prime.

It is a super-2 number, since 2×31678400151² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31678400141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1406971 + ... + 1429308.

It is an arithmetic number, because the mean of its divisors is an integer number (2046376020).

Almost surely, 2^31678400151 is an apocalyptic number.

31678400151 is a deficient number, since it is larger than the sum of its proper divisors (17434624329).

31678400151 is a wasteful number, since it uses less digits than its factorization.

31678400151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2836375 (or 2836372 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

Adding to 31678400151 its reverse (15100487613), we get a palindrome (46778887764).

The spelling of 31678400151 in words is "thirty-one billion, six hundred seventy-eight million, four hundred thousand, one hundred fifty-one".