253372981 has 8 divisors (see below), whose sum is σ = 268904664. Its totient is φ = 237911040.

The previous prime is 253372949. The next prime is 253372997. The reversal of 253372981 is 189273352.

253372981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 89302500 + 164070481 = 9450^2 + 12809^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 253372981 - 2⁵ = 253372949 is a prime.

It is a super-2 number, since 2×253372981² = 128395735001652722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253372181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9850 + ... + 24571.

It is an arithmetic number, because the mean of its divisors is an integer number (33613083).

Almost surely, 2^253372981 is an apocalyptic number.

It is an amenable number.

253372981 is a deficient number, since it is larger than the sum of its proper divisors (15531683).

253372981 is a wasteful number, since it uses less digits than its factorization.

253372981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34871.

The product of its digits is 90720, while the sum is 40.

The square root of 253372981 is about 15917.6939598674. The cubic root of 253372981 is about 632.7810046665.

The spelling of 253372981 in words is "two hundred fifty-three million, three hundred seventy-two thousand, nine hundred eighty-one".