109156531 has 16 divisors (see below), whose sum is σ = 121199328. Its totient is φ = 97484800.

The previous prime is 109156477. The next prime is 109156573. The reversal of 109156531 is 135651901.

It is a cyclic number.

It is not a de Polignac number, because 109156531 - 2¹¹ = 109154483 is a prime.

It is a super-2 number, since 2×109156531² = 23830296519907922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 109156493 and 109156502.

It is not an unprimeable number, because it can be changed into a prime (109153531) 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, 169971 + ... + 170611.

It is an arithmetic number, because the mean of its divisors is an integer number (7574958).

Almost surely, 2^109156531 is an apocalyptic number.

109156531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

109156531 is a deficient number, since it is larger than the sum of its proper divisors (12042797).

109156531 is a wasteful number, since it uses less digits than its factorization.

109156531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902.

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 109156531 is about 10447.8002947989. The cubic root of 109156531 is about 477.9141711410.

The spelling of 109156531 in words is "one hundred nine million, one hundred fifty-six thousand, five hundred thirty-one".