215051450 has 24 divisors (see below), whose sum is σ = 400725468. Its totient is φ = 85863680.

The previous prime is 215051407. The next prime is 215051453. The reversal of 215051450 is 54150512.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 115111441 + 99940009 = 10729^2 + 9997^2 .

It is a super-2 number, since 2×215051450² = 92494252294205000, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (215051453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26024 + ... + 33276.

Almost surely, 2^215051450 is an apocalyptic number.

215051450 is a deficient number, since it is larger than the sum of its proper divisors (185674018).

215051450 is a wasteful number, since it uses less digits than its factorization.

215051450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7858 (or 7853 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 215051450 is about 14664.6326241062. The cubic root of 215051450 is about 599.1204241703.

The spelling of 215051450 in words is "two hundred fifteen million, fifty-one thousand, four hundred fifty".