1651901252 has 12 divisors (see below), whose sum is σ = 2892699516. Its totient is φ = 825415680.

The previous prime is 1651901233. The next prime is 1651901263. The reversal of 1651901252 is 2521091561.

It can be written as a sum of positive squares in 2 ways, for example, as 374267716 + 1277633536 = 19346^2 + 35744^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126749 + ... + 139172.

It is an arithmetic number, because the mean of its divisors is an integer number (241058293).

Almost surely, 2^1651901252 is an apocalyptic number.

It is an amenable number.

1651901252 is a deficient number, since it is larger than the sum of its proper divisors (1240798264).

1651901252 is a wasteful number, since it uses less digits than its factorization.

1651901252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267478 (or 267476 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 1651901252 is about 40643.5880797943. The cubic root of 1651901252 is about 1182.1194438022.

The spelling of 1651901252 in words is "one billion, six hundred fifty-one million, nine hundred one thousand, two hundred fifty-two".