103149531 has 20 divisors (see below), whose sum is σ = 155279784. Its totient is φ = 68234400.

The previous prime is 103149521. The next prime is 103149569. The reversal of 103149531 is 135941301.

It is not a de Polignac number, because 103149531 - 2⁶ = 103149467 is a prime.

It is a super-2 number, since 2×103149531² = 21279651491039922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 103149495 and 103149504.

It is not an unprimeable number, because it can be changed into a prime (103149521) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5751 + ... + 15471.

Almost surely, 2^103149531 is an apocalyptic number.

103149531 is a deficient number, since it is larger than the sum of its proper divisors (52130253).

103149531 is an equidigital number, since it uses as much as digits as its factorization.

103149531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9864 (or 9855 counting only the distinct ones).

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

The square root of 103149531 is about 10156.2557569214. The cubic root of 103149531 is about 468.9815444871.

The spelling of 103149531 in words is "one hundred three million, one hundred forty-nine thousand, five hundred thirty-one".