1216150371 has 6 divisors (see below), whose sum is σ = 1756661660. Its totient is φ = 810766908.

The previous prime is 1216150361. The next prime is 1216150399. The reversal of 1216150371 is 1730516121.

1216150371 is a `hidden beast` number, since 12 + 1 + 615 + 0 + 37 + 1 = 666.

It is not a de Polignac number, because 1216150371 - 2⁵ = 1216150339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216150361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67563901 + ... + 67563918.

Almost surely, 2^1216150371 is an apocalyptic number.

1216150371 is a deficient number, since it is larger than the sum of its proper divisors (540511289).

1216150371 is a wasteful number, since it uses less digits than its factorization.

1216150371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135127825 (or 135127822 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 1216150371 is about 34873.3475737561. The cubic root of 1216150371 is about 1067.4046544105.

Adding to 1216150371 its reverse (1730516121), we get a palindrome (2946666492).

The spelling of 1216150371 in words is "one billion, two hundred sixteen million, one hundred fifty thousand, three hundred seventy-one".