771020131 has 16 divisors (see below), whose sum is σ = 890841600. Its totient is φ = 653643648.

The previous prime is 771020123. The next prime is 771020147. The reversal of 771020131 is 131020177.

771020131 = 4² + 5² + ... + 1322².

It is not a de Polignac number, because 771020131 - 2³ = 771020123 is a prime.

It is a super-2 number, since 2×771020131² = 1188944084814514322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (771020161) 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, 583890 + ... + 585208.

It is an arithmetic number, because the mean of its divisors is an integer number (55677600).

Almost surely, 2^771020131 is an apocalyptic number.

771020131 is a deficient number, since it is larger than the sum of its proper divisors (119821469).

771020131 is a wasteful number, since it uses less digits than its factorization.

771020131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178.

The product of its (nonzero) digits is 294, while the sum is 22.

The square root of 771020131 is about 27767.2492515913. The cubic root of 771020131 is about 916.9702360886.

The spelling of 771020131 in words is "seven hundred seventy-one million, twenty thousand, one hundred thirty-one".