31372143529 has 2 divisors, whose sum is σ = 31372143530. Its totient is φ = 31372143528.

The previous prime is 31372143511. The next prime is 31372143547. The reversal of 31372143529 is 92534127313.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (31372143511) and next prime (31372143547).

It can be written as a sum of positive squares in only one way, i.e., 31316611225 + 55532304 = 176965^2 + 7452^2 .

It is a cyclic number.

It is not a de Polignac number, because 31372143529 - 2⁷ = 31372143401 is a prime.

It is a super-2 number, since 2×31372143529² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31372143491 and 31372143500.

It is not a weakly prime, because it can be changed into another prime (31372143329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15686071764 + 15686071765.

It is an arithmetic number, because the mean of its divisors is an integer number (15686071765).

Almost surely, 2^31372143529 is an apocalyptic number.

It is an amenable number.

31372143529 is a deficient number, since it is larger than the sum of its proper divisors (1).

31372143529 is an equidigital number, since it uses as much as digits as its factorization.

31372143529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 40.

The spelling of 31372143529 in words is "thirty-one billion, three hundred seventy-two million, one hundred forty-three thousand, five hundred twenty-nine".