161214651 has 16 divisors (see below), whose sum is σ = 257209120. Its totient is φ = 99208800.

The previous prime is 161214649. The next prime is 161214667. The reversal of 161214651 is 156412161.

161214651 is a `hidden beast` number, since 1 + 6 + 1 + 2 + 1 + 4 + 651 = 666.

It is not a de Polignac number, because 161214651 - 2¹ = 161214649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161214671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229300 + ... + 230001.

It is an arithmetic number, because the mean of its divisors is an integer number (16075570).

Almost surely, 2^161214651 is an apocalyptic number.

161214651 is a deficient number, since it is larger than the sum of its proper divisors (95994469).

161214651 is a wasteful number, since it uses less digits than its factorization.

161214651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459323 (or 459317 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 161214651 is about 12697.0331573955. The cubic root of 161214651 is about 544.2538407241.

The spelling of 161214651 in words is "one hundred sixty-one million, two hundred fourteen thousand, six hundred fifty-one".