1901215225 has 48 divisors (see below), whose sum is σ = 2912785792. Its totient is φ = 1198748160.

The previous prime is 1901215219. The next prime is 1901215237. The reversal of 1901215225 is 5225121091.

It is not a de Polignac number, because 1901215225 - 2¹⁹ = 1900690937 is a prime.

It is a super-2 number, since 2×1901215225² = 7229238663543601250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1901215193 and 1901215202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 642349 + ... + 645301.

Almost surely, 2^1901215225 is an apocalyptic number.

It is an amenable number.

1901215225 is a deficient number, since it is larger than the sum of its proper divisors (1011570567).

1901215225 is a wasteful number, since it uses less digits than its factorization.

1901215225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3266 (or 3261 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 1901215225 is about 43602.9267939665. The cubic root of 1901215225 is about 1238.8263315829.

The spelling of 1901215225 in words is "one billion, nine hundred one million, two hundred fifteen thousand, two hundred twenty-five".