231215029 has 2 divisors, whose sum is σ = 231215030. Its totient is φ = 231215028.

The previous prime is 231214993. The next prime is 231215059. The reversal of 231215029 is 920512132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224940004 + 6275025 = 14998^2 + 2505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231215029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231214994 and 231215012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231215059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115607514 + 115607515.

It is an arithmetic number, because the mean of its divisors is an integer number (115607515).

Almost surely, 2^231215029 is an apocalyptic number.

It is an amenable number.

231215029 is a deficient number, since it is larger than the sum of its proper divisors (1).

231215029 is an equidigital number, since it uses as much as digits as its factorization.

231215029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 231215029 is about 15205.7564428739. The cubic root of 231215029 is about 613.7695706819.

The spelling of 231215029 in words is "two hundred thirty-one million, two hundred fifteen thousand, twenty-nine".