215470061 has 2 divisors, whose sum is σ = 215470062. Its totient is φ = 215470060.

The previous prime is 215470037. The next prime is 215470091. The reversal of 215470061 is 160074512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207907561 + 7562500 = 14419^2 + 2750^2 .

It is a cyclic number.

It is not a de Polignac number, because 215470061 - 2¹⁴ = 215453677 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215470061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215470091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107735030 + 107735031.

It is an arithmetic number, because the mean of its divisors is an integer number (107735031).

Almost surely, 2^215470061 is an apocalyptic number.

It is an amenable number.

215470061 is a deficient number, since it is larger than the sum of its proper divisors (1).

215470061 is an equidigital number, since it uses as much as digits as its factorization.

215470061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 215470061 is about 14678.8984940969. The cubic root of 215470061 is about 599.5089139078.

The spelling of 215470061 in words is "two hundred fifteen million, four hundred seventy thousand, sixty-one".