981225533 has 16 divisors (see below), whose sum is σ = 1089759744. Its totient is φ = 879402240.

The previous prime is 981225529. The next prime is 981225541. The reversal of 981225533 is 335522189.

It is a cyclic number.

It is not a de Polignac number, because 981225533 - 2² = 981225529 is a prime.

It is a super-2 number, since 2×981225533² = 1925607093222268178, 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 (981225503) 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, 12968 + ... + 46158.

It is an arithmetic number, because the mean of its divisors is an integer number (68109984).

Almost surely, 2^981225533 is an apocalyptic number.

It is an amenable number.

981225533 is a deficient number, since it is larger than the sum of its proper divisors (108534211).

981225533 is a wasteful number, since it uses less digits than its factorization.

981225533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33292.

The product of its digits is 64800, while the sum is 38.

The square root of 981225533 is about 31324.5196770836. The cubic root of 981225533 is about 993.7022661407.

The spelling of 981225533 in words is "nine hundred eighty-one million, two hundred twenty-five thousand, five hundred thirty-three".