131217770 has 16 divisors (see below), whose sum is σ = 240196320. Its totient is φ = 51597264.

The previous prime is 131217769. The next prime is 131217791. The reversal of 131217770 is 77712131.

131217770 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110612 + ... + 111791.

It is an arithmetic number, because the mean of its divisors is an integer number (15012270).

Almost surely, 2^131217770 is an apocalyptic number.

131217770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131217770 is a deficient number, since it is larger than the sum of its proper divisors (108978550).

131217770 is a wasteful number, since it uses less digits than its factorization.

131217770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222469.

The product of its (nonzero) digits is 2058, while the sum is 29.

The square root of 131217770 is about 11455.0325185047. The cubic root of 131217770 is about 508.1565769644.

The spelling of 131217770 in words is "one hundred thirty-one million, two hundred seventeen thousand, seven hundred seventy".