215434157 has 2 divisors, whose sum is σ = 215434158. Its totient is φ = 215434156.

The previous prime is 215434147. The next prime is 215434181. The reversal of 215434157 is 751434512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169885156 + 45549001 = 13034^2 + 6749^2 .

It is a cyclic number.

It is not a de Polignac number, because 215434157 - 2⁸ = 215433901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215434147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107717078 + 107717079.

It is an arithmetic number, because the mean of its divisors is an integer number (107717079).

Almost surely, 2^215434157 is an apocalyptic number.

It is an amenable number.

215434157 is a deficient number, since it is larger than the sum of its proper divisors (1).

215434157 is an equidigital number, since it uses as much as digits as its factorization.

215434157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 32.

The square root of 215434157 is about 14677.6754630970. The cubic root of 215434157 is about 599.4756131272.

Adding to 215434157 its reverse (751434512), we get a palindrome (966868669).

The spelling of 215434157 in words is "two hundred fifteen million, four hundred thirty-four thousand, one hundred fifty-seven".