237813250921 has 9 divisors (see below), whose sum is σ = 245747732349. Its totient is φ = 230127225900.

The previous prime is 237813250919. The next prime is 237813251023. The reversal of 237813250921 is 129052318732.

The square root of 237813250921 is 487661.

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

It is not a de Polignac number, because 237813250921 - 2¹ = 237813250919 is a prime.

It is a super-2 number, since 2×237813250921² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (237813250721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 15109626 + ... + 15125356.

Almost surely, 2^237813250921 is an apocalyptic number.

237813250921 is the 487661-st square number.

237813250921 is the 243831-st centered octagonal number.

It is an amenable number.

237813250921 is a deficient number, since it is larger than the sum of its proper divisors (7934481428).

237813250921 is an frugal number, since it uses more digits than its factorization.

237813250921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31524 (or 15762 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 237813250921 in words is "two hundred thirty-seven billion, eight hundred thirteen million, two hundred fifty thousand, nine hundred twenty-one".