31428757143 has 72 divisors (see below), whose sum is σ = 53312578800. Its totient is φ = 17788813056.

The previous prime is 31428757127. The next prime is 31428757189. The reversal of 31428757143 is 34175782413.

31428757143 is a `hidden beast` number, since 3 + 14 + 28 + 7 + 571 + 43 = 666.

It is not a de Polignac number, because 31428757143 - 2⁴ = 31428757127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31428757193) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 29399613 + ... + 29400681.

Almost surely, 2^31428757143 is an apocalyptic number.

31428757143 is a deficient number, since it is larger than the sum of its proper divisors (21883821657).

31428757143 is a wasteful number, since it uses less digits than its factorization.

31428757143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661 (or 1651 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The spelling of 31428757143 in words is "thirty-one billion, four hundred twenty-eight million, seven hundred fifty-seven thousand, one hundred forty-three".