152953981 has 4 divisors (see below), whose sum is σ = 161951292. Its totient is φ = 143956672.

The previous prime is 152953963. The next prime is 152954017. The reversal of 152953981 is 189359251.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 92813956 + 60140025 = 9634^2 + 7755^2 .

It is a cyclic number.

It is not a de Polignac number, because 152953981 - 2¹¹ = 152951933 is a prime.

It is a super-2 number, since 2×152953981² = 46789840607496722, 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 (152953961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4498630 + ... + 4498663.

It is an arithmetic number, because the mean of its divisors is an integer number (40487823).

Almost surely, 2^152953981 is an apocalyptic number.

It is an amenable number.

152953981 is a deficient number, since it is larger than the sum of its proper divisors (8997311).

152953981 is an equidigital number, since it uses as much as digits as its factorization.

152953981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8997310.

The product of its digits is 97200, while the sum is 43.

The square root of 152953981 is about 12367.4565291332. The cubic root of 152953981 is about 534.7944952700.

The spelling of 152953981 in words is "one hundred fifty-two million, nine hundred fifty-three thousand, nine hundred eighty-one".