1150021531 has 16 divisors (see below), whose sum is σ = 1245484960. Its totient is φ = 1058158080.

The previous prime is 1150021517. The next prime is 1150021589. The reversal of 1150021531 is 1351200511.

It is a 9-Lehmer number, since φ(1150021531) divides (1150021531-1)⁹.

It is a cyclic number.

It is not a de Polignac number, because 1150021531 - 2²⁹ = 613150619 is a prime.

It is a super-2 number, since 2×1150021531² = 2645099043527167922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a deceptive number, since it divides R_1150021530.

It is a junction number, because it is equal to n+sod(n) for n = 1150021499 and 1150021508.

It is not an unprimeable number, because it can be changed into a prime (1150021511) 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, 531091 + ... + 533251.

It is an arithmetic number, because the mean of its divisors is an integer number (77842810).

Almost surely, 2^1150021531 is an apocalyptic number.

1150021531 is a deficient number, since it is larger than the sum of its proper divisors (95463429).

1150021531 is a wasteful number, since it uses less digits than its factorization.

1150021531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2974.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 1150021531 is about 33911.9673714162. The cubic root of 1150021531 is about 1047.6960916247.

The spelling of 1150021531 in words is "one billion, one hundred fifty million, twenty-one thousand, five hundred thirty-one".