22729537 has 4 divisors (see below), whose sum is σ = 22740016. Its totient is φ = 22719060.

The previous prime is 22729523. The next prime is 22729547. The reversal of 22729537 is 73592722.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22729537 - 2⁷ = 22729409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22729496 and 22729505.

It is not an unprimeable number, because it can be changed into a prime (22729547) 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, 639 + ... + 6772.

It is an arithmetic number, because the mean of its divisors is an integer number (5685004).

Almost surely, 2^22729537 is an apocalyptic number.

It is an amenable number.

22729537 is a deficient number, since it is larger than the sum of its proper divisors (10479).

22729537 is an equidigital number, since it uses as much as digits as its factorization.

22729537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10478.

The product of its digits is 52920, while the sum is 37.

The square root of 22729537 is about 4767.5504192405. The cubic root of 22729537 is about 283.2675739739.

The spelling of 22729537 in words is "twenty-two million, seven hundred twenty-nine thousand, five hundred thirty-seven".