72214651 has 4 divisors (see below), whose sum is σ = 72252472. Its totient is φ = 72176832.

The previous prime is 72214633. The next prime is 72214661. The reversal of 72214651 is 15641227.

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

It is a cyclic number.

It is not a de Polignac number, because 72214651 - 2⁵ = 72214619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72214661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15885 + ... + 19918.

It is an arithmetic number, because the mean of its divisors is an integer number (18063118).

Almost surely, 2^72214651 is an apocalyptic number.

72214651 is a deficient number, since it is larger than the sum of its proper divisors (37821).

72214651 is a wasteful number, since it uses less digits than its factorization.

72214651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37820.

The product of its digits is 3360, while the sum is 28.

The square root of 72214651 is about 8497.9203926608. The cubic root of 72214651 is about 416.4297730387.

Adding to 72214651 its reverse (15641227), we get a palindrome (87855878).

The spelling of 72214651 in words is "seventy-two million, two hundred fourteen thousand, six hundred fifty-one".