37221473 has 4 divisors (see below), whose sum is σ = 37233840. Its totient is φ = 37209108.

The previous prime is 37221463. The next prime is 37221487. The reversal of 37221473 is 37412273.

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 37221473 - 2¹⁴ = 37205089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37221463) 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, 1586 + ... + 8772.

It is an arithmetic number, because the mean of its divisors is an integer number (9308460).

Almost surely, 2^37221473 is an apocalyptic number.

It is an amenable number.

37221473 is a deficient number, since it is larger than the sum of its proper divisors (12367).

37221473 is an equidigital number, since it uses as much as digits as its factorization.

37221473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12366.

The product of its digits is 7056, while the sum is 29.

The square root of 37221473 is about 6100.9403373578. The cubic root of 37221473 is about 333.8857253059.

The spelling of 37221473 in words is "thirty-seven million, two hundred twenty-one thousand, four hundred seventy-three".