22230385737921 has 45 divisors (see below), whose sum is σ = 33419050342579. Its totient is φ = 14726817052416.

The previous prime is 22230385737907. The next prime is 22230385737979. The reversal of 22230385737921 is 12973758303222.

The square root of 22230385737921 is 4714911.

It is a perfect power (a square), and thus also a powerful number.

22230385737921 is a `hidden beast` number, since 2 + 2 + 2 + 30 + 38 + 573 + 7 + 9 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 22202048729025 + 28337008896 = 4711905^2 + 168336^2 .

It is not a de Polignac number, because 22230385737921 - 2³⁷ = 22092946784449 is a prime.

It is a super-2 number, since 2×22230385737921² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22230385787921) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 7086509665 + ... + 7086512801.

Almost surely, 2^{22230385737921} is an apocalyptic number.

22230385737921 is the 4714911-st square number.

22230385737921 is the 2357456-th centered octagonal number.

It is an amenable number.

22230385737921 is a deficient number, since it is larger than the sum of its proper divisors (11188664604658).

22230385737921 is an frugal number, since it uses more digits than its factorization.

22230385737921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6620 (or 3307 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 54.

The spelling of 22230385737921 in words is "twenty-two trillion, two hundred thirty billion, three hundred eighty-five million, seven hundred thirty-seven thousand, nine hundred twenty-one".