30997622 has 4 divisors (see below), whose sum is σ = 46496436. Its totient is φ = 15498810.

The previous prime is 30997573. The next prime is 30997627. The reversal of 30997622 is 22679903.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22679903 = 283 ⋅80141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30997627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7749404 + ... + 7749407.

It is an arithmetic number, because the mean of its divisors is an integer number (11624109).

Almost surely, 2^30997622 is an apocalyptic number.

30997622 is a deficient number, since it is larger than the sum of its proper divisors (15498814).

30997622 is a wasteful number, since it uses less digits than its factorization.

30997622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15498813.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 30997622 is about 5567.5508080304. The cubic root of 30997622 is about 314.1300325572.

The spelling of 30997622 in words is "thirty million, nine hundred ninety-seven thousand, six hundred twenty-two".