215101402 has 4 divisors (see below), whose sum is σ = 322652106. Its totient is φ = 107550700.

The previous prime is 215101379. The next prime is 215101421. The reversal of 215101402 is 204101512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 121418361 + 93683041 = 11019^2 + 9679^2 .

It is a super-2 number, since 2×215101402² = 92537226284731208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53775349 + ... + 53775352.

Almost surely, 2^215101402 is an apocalyptic number.

215101402 is a deficient number, since it is larger than the sum of its proper divisors (107550704).

215101402 is a wasteful number, since it uses less digits than its factorization.

215101402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107550703.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 215101402 is about 14666.3356705075. The cubic root of 215101402 is about 599.1668083365.

Adding to 215101402 its reverse (204101512), we get a palindrome (419202914).

The spelling of 215101402 in words is "two hundred fifteen million, one hundred one thousand, four hundred two".