21590150 has 12 divisors (see below), whose sum is σ = 40157772. Its totient is φ = 8636040.

The previous prime is 21590117. The next prime is 21590183. The reversal of 21590150 is 5109512.

It is an interprime number because it is at equal distance from previous prime (21590117) and next prime (21590183).

It is a super-2 number, since 2×21590150² = 932269154045000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 215852 + ... + 215951.

It is an arithmetic number, because the mean of its divisors is an integer number (3346481).

Almost surely, 2^21590150 is an apocalyptic number.

21590150 is a deficient number, since it is larger than the sum of its proper divisors (18567622).

21590150 is a wasteful number, since it uses less digits than its factorization.

21590150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431815 (or 431810 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 21590150 is about 4646.5202033350. The cubic root of 21590150 is about 278.4529905710.

Adding to 21590150 its reverse (5109512), we get a palindrome (26699662).

The spelling of 21590150 in words is "twenty-one million, five hundred ninety thousand, one hundred fifty".