152391213 has 40 divisors (see below), whose sum is σ = 259608888. Its totient is φ = 88252416.

The previous prime is 152391181. The next prime is 152391233. The reversal of 152391213 is 312193251.

It can be written as a sum of positive squares in 4 ways, for example, as 57562569 + 94828644 = 7587^2 + 9738^2 .

It is not a de Polignac number, because 152391213 - 2⁵ = 152391181 is a prime.

It is a super-2 number, since 2×152391213² = 46446163599222738, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152391233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 13645 + ... + 22157.

Almost surely, 2^152391213 is an apocalyptic number.

152391213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

152391213 is a deficient number, since it is larger than the sum of its proper divisors (107217675).

152391213 is a wasteful number, since it uses less digits than its factorization.

152391213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8555 (or 8546 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 152391213 is about 12344.6835925430. The cubic root of 152391213 is about 534.1377942597.

The spelling of 152391213 in words is "one hundred fifty-two million, three hundred ninety-one thousand, two hundred thirteen".