251242332 has 48 divisors (see below), whose sum is σ = 643504512. Its totient is φ = 75660480.

The previous prime is 251242331. The next prime is 251242333. The reversal of 251242332 is 233242152.

It is an interprime number because it is at equal distance from previous prime (251242331) and next prime (251242333).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251242331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15678 + ... + 27354.

It is an arithmetic number, because the mean of its divisors is an integer number (13406344).

Almost surely, 2^251242332 is an apocalyptic number.

251242332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 251242332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321752256).

251242332 is an abundant number, since it is smaller than the sum of its proper divisors (392262180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251242332 is a wasteful number, since it uses less digits than its factorization.

251242332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11858 (or 11856 counting only the distinct ones).

The product of its digits is 2880, while the sum is 24.

The square root of 251242332 is about 15850.6256027956. The cubic root of 251242332 is about 631.0022947083.

Adding to 251242332 its reverse (233242152), we get a palindrome (484484484).

It can be divided in two parts, 2512 and 42332, that added together give a palindrome (44844).

The spelling of 251242332 in words is "two hundred fifty-one million, two hundred forty-two thousand, three hundred thirty-two".